21385220

素因数分解:

$2^2\times 5^1\times {\mathrm{617}}^1\times {\mathrm{1733}}^1$

素因数の和:2359

約数の個数: 24

約数和(自身を含む): 45007704

約数和(自身を除く): 23622484

約数列:

[1, 2, 4, 5, 10, 20, 617, 1234, 1733, 2468, 3085, 3466, 6170, 6932, 8665, 12340, 17330, 34660, 1069261, 2138522, 4277044, 5346305, 10692610, 21385220]

約数ペア:

[(1, 21385220), (2, 10692610), (4, 5346305), (5, 4277044), (10, 2138522), (20, 1069261), (617, 34660), (1234, 17330), (1733, 12340), (2468, 8665), (3085, 6932), (3466, 6170)]