Tag Archives: 整数論

Perfect Number and Semi-Perfect Number (Ruby)


I wrote the code to check perfect number and semipefrect number in Ruby. Semiperfect number is also called pseudoperfect number.

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(日本語) 整数論的関数の反転公式 メビウスの反転公式


Sorry, this entry is only available in Japanese.


(日本語) ピタゴラス数: ディオファントスの式


Sorry, this entry is only available in Japanese.