21556660

素因数分解:

$2^2\times 5^1\times {\mathrm{877}}^1\times {\mathrm{1229}}^1$

素因数の和:2115

約数の個数: 24

約数和(自身を含む): 45357480

約数和(自身を除く): 23800820

約数列:

[1, 2, 4, 5, 10, 20, 877, 1229, 1754, 2458, 3508, 4385, 4916, 6145, 8770, 12290, 17540, 24580, 1077833, 2155666, 4311332, 5389165, 10778330, 21556660]

約数ペア:

[(1, 21556660), (2, 10778330), (4, 5389165), (5, 4311332), (10, 2155666), (20, 1077833), (877, 24580), (1229, 17540), (1754, 12290), (2458, 8770), (3508, 6145), (4385, 4916)]