21090220

素因数分解:

$2^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{5521}}^1$

素因数の和:5721

約数の個数: 24

約数和(自身を含む): 44529408

約数和(自身を除く): 23439188

約数列:

[1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910, 3820, 5521, 11042, 22084, 27605, 55210, 110420, 1054511, 2109022, 4218044, 5272555, 10545110, 21090220]

約数ペア:

[(1, 21090220), (2, 10545110), (4, 5272555), (5, 4218044), (10, 2109022), (20, 1054511), (191, 110420), (382, 55210), (764, 27605), (955, 22084), (1910, 11042), (3820, 5521)]