21987044

素因数分解:

$2^2\times {\mathrm{109}}^1\times {\mathrm{211}}^1\times {\mathrm{239}}^1$

素因数の和:563

約数の個数: 24

約数和(自身を含む): 39177600

約数和(自身を除く): 17190556

約数列:

[1, 2, 4, 109, 211, 218, 239, 422, 436, 478, 844, 956, 22999, 26051, 45998, 50429, 52102, 91996, 100858, 104204, 201716, 5496761, 10993522, 21987044]

約数ペア:

[(1, 21987044), (2, 10993522), (4, 5496761), (109, 201716), (211, 104204), (218, 100858), (239, 91996), (422, 52102), (436, 50429), (478, 45998), (844, 26051), (956, 22999)]