21985960

素因数分解:

$2^3\times 5^1\times {\mathrm{549649}}^1$

素因数の和:549660

約数の個数: 16

約数和(自身を含む): 49468500

約数和(自身を除く): 27482540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 549649, 1099298, 2198596, 2748245, 4397192, 5496490, 10992980, 21985960]

約数ペア:

[(1, 21985960), (2, 10992980), (4, 5496490), (5, 4397192), (8, 2748245), (10, 2198596), (20, 1099298), (40, 549649)]