21162640

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2341}}^1$

素因数の和:2467

約数の個数: 40

約数和(自身を含む): 49659768

約数和(自身を除く): 28497128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 2341, 4520, 4682, 9040, 9364, 11705, 18728, 23410, 37456, 46820, 93640, 187280, 264533, 529066, 1058132, 1322665, 2116264, 2645330, 4232528, 5290660, 10581320, 21162640]

約数ペア:

[(1, 21162640), (2, 10581320), (4, 5290660), (5, 4232528), (8, 2645330), (10, 2116264), (16, 1322665), (20, 1058132), (40, 529066), (80, 264533), (113, 187280), (226, 93640), (452, 46820), (565, 37456), (904, 23410), (1130, 18728), (1808, 11705), (2260, 9364), (2341, 9040), (4520, 4682)]