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📱スマホケースセール開催中!新登場のAndroidケースも対象✨

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どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :side
Non-printed areas are white
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :camera lens hole
Printing even the edges and sides of the case
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :bottom edge
Printing even the edges and sides of the case
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :bottom edge
Covering even the edges and sides of the case
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :side
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :camera lens hole
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :bottom edge
どぅーどぅりあんの【White】 xを求めよ。(1, 2) iPhone Smartphone Case :bottom edge

【White】 xを求めよ。(1, 2)

iPhone Smartphone Case

Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,223 JPY2,723 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,223 JPY2,723 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,223 JPY2,723 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
2,783 JPY2,283 JPY (Tax included)
Sale price
2,783 JPY2,283 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
2,783 JPY2,283 JPY (Tax included)
Sale price
3,003 JPY2,503 JPY (Tax included)
Sale price
2,783 JPY2,283 JPY (Tax included)
At the earliest, 6 days to deliver (Excluding weekends and holidays) * Shipping days in Japan

White color will not be printed with the color you are selecting. Please make sure to check the design in the preview

About this design

「数学が嫌い...」
「数字をみるとアレルギー反応を起こす...」
「数学?何それ?」

という方々に、少しでも数学を身近に感じて欲しい、数学に愛を持って欲しいと思い、作りました✨

✏️中央の数字「220」「284」は「友愛数」といいます。
実はこの2つ、とてもロマンチックな数字なのです!

「友愛数」とは、その数自身を除いた約数の合計が、もう片方の数と全く同じになる数のことをいいます。

・220の約数
(1、2、4、5、10、11、20、22、44、55、110)を
全て足すと284に。

・284の約数(1、2、4、71、142)を全て足すと
220に。

このように、お互いに深い関係をもった数なんです♪

この作品では、友愛数の「愛」つまり、「LOVE」を図形で表現してみました✨

✏️友愛数「220」「284」の間にある正六角形。

正六角形は単なる図形というだけでなく、
隙間なく敷き詰められる最も大きい正多角形なのです♪

これ以上の正多角形では隙間なく敷き詰めることができないんですね。

「220」と「284」はそれぞれの約数を余すことなく、お互いを表現しあっているわけですが、その様子は隙間なく敷き詰められる正六角形に共通するものがあると思いました。

✨商品名の横に書いている( , )は、作品のバージョンです。関数の座標をイメージしています。

✨この作品が数学嫌いな方の、数学への入口としていただけましたら、これ以上嬉しいことはありません。

✨デザインは2パターンご用意しております!
お好きな方をお選びください。

  • Device Width (cm) Length (cm)
    iPhone 16 7.4 15.0
    iPhone 16 Plus 8.0 16.3
    iPhone 16 Pro 7.4 15.2
    iPhone 16 Pro Max 8.0 16.5
    iPhone 15 7.4 14.9
    iPhone 15 Plus 8.0 16.3
    iPhone 15 Pro 7.3 14.9
    iPhone 15 Pro Max 7.9 16.2
    iPhone 14 7.4 14.9
    iPhone 14 Plus 8.0 16.3
    iPhone 14 Pro 7.4 14.9
    iPhone 14 Pro Max 8.0 16.3
    iPhone 13 7.4 14.9
    iPhone 13 Pro 7.4 14.9
    iPhone 13 Pro Max 8.1 16.4
    iPhone 13 mini 6.7 13.4
    iPhone 12 / 12 Pro 7.4 14.9
    iPhone 12 Pro Max 8.1 16.4
    iPhone 12 mini 6.7 13.4
    iPhone 11 7.8 15.0
    iPhone 11 Pro 7.3 14.3
    iPhone 11 Pro Max 7.9 15.7
    iPhone XS / X 8.1 14.8
    iPhone XR 7.8 15.0
    iPhone XS Max 7.9 16.0
    iPhone SE(第2・3世代) / 8 / 7 7.0 13.9
    iPhone 8 Plus / 7 Plus 8.0 15.9
    iPhone 6s / 6 6.9 13.7
    iPhone 6s Plus / 6 Plus 8 15.8
    Fabric
    • Polycarbonate
  • Shipping cost:Flat Fee(Tax included)
    • TA-Q-BIN(YAMATO TRANSPORT) 700 JPY
    • Nekopos(YAMATO TRANSPORT) 260 JPY

    ※ Nekopos(YAMATO TRANSPORT) can use only when purchase up to total 2 products that consist of any of smartphone cases, clear multipurpose cases and mini clear multipurpose cases

    At the earliest, 6 days to deliver (Excluding weekends and holidays) * Shipping days in Japan
    • The day required for shipping is approximate. It does not promise reliable shipment
    • Designation of shipping date is not received. Since shipment may be delayed, thank you for your order with plenty
    • It’s completely made to order. In the event of a shipment delay or cancellation of your order due to customer convenience, we can’t accept returned goods or exchange
    Printing Notice
    • Printing misalignment may occur by up to 5mm (ordinarily 1~2mm)
    • These are sample images. It may differ from the appearance of the actual product
    • Colors may differ from the actual product due to monitor settings.
    • During printing, colors may change due to the conversion from RGB colors to CMYK colors
    • The print may be blurred due to the convex shape around the camera.
    • Credit card / Debit card
      VISA
      Mastercard
      Diners Club
      JCB
      American Express
    • Deferred payment
    • Convenience store payment
    • QR Code (PayPay)
    • Amazon Pay amazon pay
Also available on
View this design

Color

Size

  • iPhone 16
  • Out of stock
  • iPhone 16 Plus
  • Out of stock
  • iPhone 16 Pro
  • Out of stock
  • iPhone 16 Pro Max
  • Out of stock
  • iPhone 15
  • Out of stock
  • iPhone 15 Plus
  • Out of stock
  • iPhone 15 Pro
  • Out of stock
  • iPhone 15 Pro Max
  • Out of stock
  • iPhone 14
  • Out of stock
  • iPhone 14 Plus
  • Out of stock
  • iPhone 14 Pro
  • Out of stock
  • iPhone 14 Pro Max
  • Out of stock
  • iPhone 13
  • Out of stock
  • iPhone 13 Pro
  • Out of stock
  • iPhone 13 Pro Max
  • Out of stock
  • iPhone 13 mini
  • Out of stock
  • iPhone 12/12 Pro
  • Out of stock
  • iPhone 12 Pro Max
  • Out of stock
  • iPhone 12 mini
  • Out of stock
  • iPhone 11
  • Out of stock
  • iPhone 11 Pro
  • Out of stock
  • iPhone 11 Pro Max
  • Out of stock
  • iPhone XS/X
  • Out of stock
  • iPhone XR
  • Out of stock
  • iPhone XS Max
  • Out of stock
  • iPhone 8/7/SE(2nd/3rd generation)
  • Out of stock
  • iPhone 8 Plus/7 Plus
  • Out of stock
  • iPhone 6s/6
  • Out of stock
  • iPhone 6s Plus/6 Plus
  • Out of stock
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