21557540

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{3511}}^1$

素因数の和:3827

約数の個数: 24

約数和(自身を含む): 45431232

約数和(自身を除く): 23873692

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 3511, 6140, 7022, 14044, 17555, 35110, 70220, 1077877, 2155754, 4311508, 5389385, 10778770, 21557540]

約数ペア:

[(1, 21557540), (2, 10778770), (4, 5389385), (5, 4311508), (10, 2155754), (20, 1077877), (307, 70220), (614, 35110), (1228, 17555), (1535, 14044), (3070, 7022), (3511, 6140)]