20391404

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{42131}}^1$

素因数の和:42157

約数の個数: 18

約数和(自身を含む): 39224892

約数和(自身を除く): 18833488

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 42131, 84262, 168524, 463441, 926882, 1853764, 5097851, 10195702, 20391404]

約数ペア:

[(1, 20391404), (2, 10195702), (4, 5097851), (11, 1853764), (22, 926882), (44, 463441), (121, 168524), (242, 84262), (484, 42131)]