21791540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25339}}^1$

素因数の和:25391

約数の個数: 24

約数和(自身を含む): 46828320

約数和(自身を除く): 25036780

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25339, 50678, 101356, 126695, 253390, 506780, 1089577, 2179154, 4358308, 5447885, 10895770, 21791540]

約数ペア:

[(1, 21791540), (2, 10895770), (4, 5447885), (5, 4358308), (10, 2179154), (20, 1089577), (43, 506780), (86, 253390), (172, 126695), (215, 101356), (430, 50678), (860, 25339)]