21502540

素因数分解:

$2^2\times 5^1\times {\mathrm{311}}^1\times {\mathrm{3457}}^1$

素因数の和:3777

約数の個数: 24

約数和(自身を含む): 45313632

約数和(自身を除く): 23811092

約数列:

[1, 2, 4, 5, 10, 20, 311, 622, 1244, 1555, 3110, 3457, 6220, 6914, 13828, 17285, 34570, 69140, 1075127, 2150254, 4300508, 5375635, 10751270, 21502540]

約数ペア:

[(1, 21502540), (2, 10751270), (4, 5375635), (5, 4300508), (10, 2150254), (20, 1075127), (311, 69140), (622, 34570), (1244, 17285), (1555, 13828), (3110, 6914), (3457, 6220)]