21309740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17467}}^1$

素因数の和:17537

約数の個数: 24

約数和(自身を含む): 45486672

約数和(自身を除く): 24176932

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17467, 34934, 69868, 87335, 174670, 349340, 1065487, 2130974, 4261948, 5327435, 10654870, 21309740]

約数ペア:

[(1, 21309740), (2, 10654870), (4, 5327435), (5, 4261948), (10, 2130974), (20, 1065487), (61, 349340), (122, 174670), (244, 87335), (305, 69868), (610, 34934), (1220, 17467)]