21531620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97871}}^1$

素因数の和:97891

約数の個数: 24

約数和(自身を含む): 49327488

約数和(自身を除く): 27795868

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97871, 195742, 391484, 489355, 978710, 1076581, 1957420, 2153162, 4306324, 5382905, 10765810, 21531620]

約数ペア:

[(1, 21531620), (2, 10765810), (4, 5382905), (5, 4306324), (10, 2153162), (11, 1957420), (20, 1076581), (22, 978710), (44, 489355), (55, 391484), (110, 195742), (220, 97871)]