21108580

素因数分解:

$2^2\times 5^1\times {\mathrm{1055429}}^1$

素因数の和:1055438

約数の個数: 12

約数和(自身を含む): 44328060

約数和(自身を除く): 23219480

約数列:

[1, 2, 4, 5, 10, 20, 1055429, 2110858, 4221716, 5277145, 10554290, 21108580]

約数ペア:

[(1, 21108580), (2, 10554290), (4, 5277145), (5, 4221716), (10, 2110858), (20, 1055429)]