{"height":"190","description":"Problem 21 module Problem_0021 (* \u3010\u554f\u984c\u3011 d(n)\u3092n\u306e\u771f\u306e\u7d04\u6570\u306e\u548c\u3068\u5b9a\u7fa9\u3059\u308b\u3002 \uff08\u771f\u306e\u7d04\u6570\u3068\u306fn\u4ee5\u5916\u306e\u7d04\u6570\u306e\u3053\u3068\u3067\u3042\u308b\u3002\uff09 \u3082\u3057\u3001d(a) = b \u304b\u3064 d(b) = a\uff08a \u2260 b\uff09\u3092\u6e80\u305f\u3059\u3068\u304d\u3001 a\u3068b\u306f\u53cb\u611b\u6570\uff08\u89aa\u548c\u6570\uff09\u3067\u3042\u308b\u3068\u3044\u3046\u3002 \u4f8b\u3048\u3070\u3001220\u306e\u7d04\u6570\u306f1,2,4,5,10,11,20,22,44,55,110\u306a\u306e\u3067 d(220) = 284\u3067\u3042\u308b\u3002 \u307e\u305f\u3001284\u306e\u7d04\u6570\u306f1, 2, 4, 71, 142\u306a\u306e\u3067d(284) = 220\u3067\u3042\u308b\u3002 \u305d\u308c\u3067\u306f10000\u672a\u6e80\u306e\u53cb\u611b\u6570\u306e\u5408\u8a08\u3092\u6c42\u3081\u3088\u3002 *) (* \u25a0\u30a2\u30d7\u30ed\u30fc\u30c1\uff11 1\u304b\u3089\u9806\u756a\u306b\u7d04\u6570\u306e\u548c\u3092\u8a08\u7b97\u3057\u3066\u3044\u2026","published":"2011-11-26 04:51:58","author_url":"https://blog.hatena.ne.jp/regerege/","url":"https://regerege.hatenadiary.org/entry/20111126/1322337118","author_name":"regerege","type":"rich","version":"1.0","image_url":null,"width":"100%","blog_url":"https://regerege.hatenadiary.org/","provider_name":"Hatena Blog","title":"Problem 21","categories":["F#","Project Euler"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fregerege.hatenadiary.org%2Fentry%2F20111126%2F1322337118\" title=\"Problem 21 - regerege \u30e1\u30e2\u5e33\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","blog_title":"regerege \u30e1\u30e2\u5e33"}