21716080

素因数分解:

$2^4\times 5^1\times {\mathrm{271451}}^1$

素因数の和:271464

約数の個数: 20

約数和(自身を含む): 50490072

約数和(自身を除く): 28773992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271451, 542902, 1085804, 1357255, 2171608, 2714510, 4343216, 5429020, 10858040, 21716080]

約数ペア:

[(1, 21716080), (2, 10858040), (4, 5429020), (5, 4343216), (8, 2714510), (10, 2171608), (16, 1357255), (20, 1085804), (40, 542902), (80, 271451)]