{"categories":["\u6570\u5b66","Python"],"published":"2009-08-08 00:00:00","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20090808%2Fp1\" title=\"Project Euler 248 - inamori\u2019s diary\" 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","provider_name":"Hatena Blog","url":"https://inamori.hateblo.jp/entry/20090808/p1","description":"\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30aa\u30a4\u30e9\u30fc http://projecteuler.net/ Q248. \u03c6(n) = 13!\u3068\u306a\u308b\u5c0f\u3055\u3044\u307b\u3046\u304b\u308915\u4e07\u756a\u76ee\u306en\u3002 n = pe\u306a\u3089\u3001\u03c6(n) = (p - 1)pe-1\u3067\u3001\u304b\u3064\u4e57\u6cd5\u7684\u3067\u3042\u308b\uff08(x, y) = 1\u306a\u3089\u3001\u03c6(xy) = \u03c6(x)\u03c6(y)\uff09\u3002 \u307e\u305a\u30011\u3092\u5f15\u304f\u306813!\u306e\u7d04\u6570\u306b\u306a\u308b\u7d20\u6570\u3092\u5168\u3066\u6c42\u3081\u308b\u3002\u305d\u306e\u7d44\u5408\u305b\u3067\u3001\u518d\u5e30\u7684\u306b13!\u306b\u306a\u308b\u6574\u6570\u3092\u5168\u3066\u6c42\u3081\u3001\u30bd\u30fc\u30c8\u3057\u306615\u4e07\u756a\u76ee\u306e\u6574\u6570\u3092\u8868\u793a\u3059\u308b\u3002\u3082\u3063\u3068\u7d30\u304b\u304f\u5236\u5fa1\u3059\u308c\u3070\u901f\u304f\u306a\u308b\u3093\u3060\u308d\u3046\u3051\u3069\u3002","author_name":"inamori","type":"rich","blog_url":"https://inamori.hateblo.jp/","width":"100%","author_url":"https://blog.hatena.ne.jp/inamori/","title":"Project Euler 248","blog_title":"inamori\u2019s diary","image_url":null,"version":"1.0"}