20217413860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{561907}}^1$

素因数の和:562180

約数の個数: 48

約数和(自身を含む): 48710680704

約数和(自身を除く): 28493266844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 257, 514, 1028, 1285, 1799, 2570, 3598, 5140, 7196, 8995, 17990, 35980, 561907, 1123814, 2247628, 2809535, 3933349, 5619070, 7866698, 11238140, 15733396, 19666745, 39333490, 78666980, 144410099, 288820198, 577640396, 722050495, 1010870693, 1444100990, 2021741386, 2888201980, 4043482772, 5054353465, 10108706930, 20217413860]

約数ペア:

[(1, 20217413860), (2, 10108706930), (4, 5054353465), (5, 4043482772), (7, 2888201980), (10, 2021741386), (14, 1444100990), (20, 1010870693), (28, 722050495), (35, 577640396), (70, 288820198), (140, 144410099), (257, 78666980), (514, 39333490), (1028, 19666745), (1285, 15733396), (1799, 11238140), (2570, 7866698), (3598, 5619070), (5140, 3933349), (7196, 2809535), (8995, 2247628), (17990, 1123814), (35980, 561907)]