21720700

素因数分解:

$2^2\times 5^2\times {\mathrm{217207}}^1$

素因数の和:217221

約数の個数: 18

約数和(自身を含む): 47134136

約数和(自身を除く): 25413436

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 217207, 434414, 868828, 1086035, 2172070, 4344140, 5430175, 10860350, 21720700]

約数ペア:

[(1, 21720700), (2, 10860350), (4, 5430175), (5, 4344140), (10, 2172070), (20, 1086035), (25, 868828), (50, 434414), (100, 217207)]