21289360

素因数分解:

$2^4\times 5^1\times {\mathrm{266117}}^1$

素因数の和:266130

約数の個数: 20

約数和(自身を含む): 49497948

約数和(自身を除く): 28208588

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266117, 532234, 1064468, 1330585, 2128936, 2661170, 4257872, 5322340, 10644680, 21289360]

約数ペア:

[(1, 21289360), (2, 10644680), (4, 5322340), (5, 4257872), (8, 2661170), (10, 2128936), (16, 1330585), (20, 1064468), (40, 532234), (80, 266117)]