21817360

素因数分解:

$2^4\times 5^1\times {\mathrm{272717}}^1$

素因数の和:272730

約数の個数: 20

約数和(自身を含む): 50725548

約数和(自身を除く): 28908188

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272717, 545434, 1090868, 1363585, 2181736, 2727170, 4363472, 5454340, 10908680, 21817360]

約数ペア:

[(1, 21817360), (2, 10908680), (4, 5454340), (5, 4363472), (8, 2727170), (10, 2181736), (16, 1363585), (20, 1090868), (40, 545434), (80, 272717)]