21581852

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{163}}^1\times {\mathrm{419}}^1$

素因数の和:665

約数の個数: 24

約数和(自身を含む): 38572800

約数和(自身を除く): 16990948

約数列:

[1, 2, 4, 79, 158, 163, 316, 326, 419, 652, 838, 1676, 12877, 25754, 33101, 51508, 66202, 68297, 132404, 136594, 273188, 5395463, 10790926, 21581852]

約数ペア:

[(1, 21581852), (2, 10790926), (4, 5395463), (79, 273188), (158, 136594), (163, 132404), (316, 68297), (326, 66202), (419, 51508), (652, 33101), (838, 25754), (1676, 12877)]