81423380

素因数分解:

$2^2\times 5^1\times {\mathrm{1049}}^1\times {\mathrm{3881}}^1$

素因数の和:4939

約数の個数: 24

約数和(自身を含む): 171196200

約数和(自身を除く): 89772820

約数列:

[1, 2, 4, 5, 10, 20, 1049, 2098, 3881, 4196, 5245, 7762, 10490, 15524, 19405, 20980, 38810, 77620, 4071169, 8142338, 16284676, 20355845, 40711690, 81423380]

約数ペア:

[(1, 81423380), (2, 40711690), (4, 20355845), (5, 16284676), (10, 8142338), (20, 4071169), (1049, 77620), (2098, 38810), (3881, 20980), (4196, 19405), (5245, 15524), (7762, 10490)]