21680054

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{887}}^1$

素因数の和:1012

約数の個数: 24

約数和(自身を含む): 36139824

約数和(自身を除く): 14459770

約数列:

[1, 2, 11, 22, 101, 121, 202, 242, 887, 1111, 1774, 2222, 9757, 12221, 19514, 24442, 89587, 107327, 179174, 214654, 985457, 1970914, 10840027, 21680054]

約数ペア:

[(1, 21680054), (2, 10840027), (11, 1970914), (22, 985457), (101, 214654), (121, 179174), (202, 107327), (242, 89587), (887, 24442), (1111, 19514), (1774, 12221), (2222, 9757)]