{"height":"190","author_name":"inamori","version":"1.0","blog_title":"inamori\u2019s diary","url":"https://inamori.hateblo.jp/entry/20090503/p2","image_url":null,"author_url":"https://blog.hatena.ne.jp/inamori/","blog_url":"https://inamori.hateblo.jp/","provider_name":"Hatena Blog","title":"Project Euler 69","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finamori.hateblo.jp%2Fentry%2F20090503%2Fp2\" title=\"Project Euler 69 - 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>","categories":["\u6570\u5b66","Python"],"provider_url":"https://hatena.blog","type":"rich","width":"100%","description":"\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30aa\u30a4\u30e9\u30fc http://projecteuler.net/index.php Q69. n \u2264 1000000 \u3067n/\u03c6(n)\u304c\u6700\u5927\u306b\u306a\u308bn n = pn1e1pn2e2\u2026pnmem\u3068\u7d20\u56e0\u6570\u5206\u89e3\u3055\u308c\u308b\u306a\u3089\u3001\u03c6(n)/n = (1-1/pn1)(1-1/pn2)\u2026(1-1/pnm)\u3060\u304b\u3089\u3001n = 2 * 3 * \u2026\u3002","published":"2009-05-03 00:00:01"}