21222160

素因数分解:

$2^4\times 5^1\times {\mathrm{265277}}^1$

素因数の和:265290

約数の個数: 20

約数和(自身を含む): 49341708

約数和(自身を除く): 28119548

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265277, 530554, 1061108, 1326385, 2122216, 2652770, 4244432, 5305540, 10611080, 21222160]

約数ペア:

[(1, 21222160), (2, 10611080), (4, 5305540), (5, 4244432), (8, 2652770), (10, 2122216), (16, 1326385), (20, 1061108), (40, 530554), (80, 265277)]