21778040

素因数分解:

$2^3\times 5^1\times {\mathrm{544451}}^1$

素因数の和:544462

約数の個数: 16

約数和(自身を含む): 49000680

約数和(自身を除く): 27222640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 544451, 1088902, 2177804, 2722255, 4355608, 5444510, 10889020, 21778040]

約数ペア:

[(1, 21778040), (2, 10889020), (4, 5444510), (5, 4355608), (8, 2722255), (10, 2177804), (20, 1088902), (40, 544451)]