21175357

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{491}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 24891264

約数和(自身を除く): 3715907

約数列:

[1, 7, 61, 101, 427, 491, 707, 3437, 6161, 29951, 43127, 49591, 209657, 347137, 3025051, 21175357]

約数ペア:

[(1, 21175357), (7, 3025051), (61, 347137), (101, 209657), (427, 49591), (491, 43127), (707, 29951), (3437, 6161)]