21805310

素因数分解:

$2^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{4441}}^1$

素因数の和:4939

約数の個数: 16

約数和(自身を含む): 39338352

約数和(自身を除く): 17533042

約数列:

[1, 2, 5, 10, 491, 982, 2455, 4441, 4910, 8882, 22205, 44410, 2180531, 4361062, 10902655, 21805310]

約数ペア:

[(1, 21805310), (2, 10902655), (5, 4361062), (10, 2180531), (491, 44410), (982, 22205), (2455, 8882), (4441, 4910)]