21357820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97081}}^1$

素因数の和:97101

約数の個数: 24

約数和(自身を含む): 48929328

約数和(自身を除く): 27571508

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 97081, 194162, 388324, 485405, 970810, 1067891, 1941620, 2135782, 4271564, 5339455, 10678910, 21357820]

約数ペア:

[(1, 21357820), (2, 10678910), (4, 5339455), (5, 4271564), (10, 2135782), (11, 1941620), (20, 1067891), (22, 970810), (44, 485405), (55, 388324), (110, 194162), (220, 97081)]