21663640

素因数分解:

$2^3\times 5^1\times {\mathrm{379}}^1\times {\mathrm{1429}}^1$

素因数の和:1819

約数の個数: 32

約数和(自身を含む): 48906000

約数和(自身を除く): 27242360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 379, 758, 1429, 1516, 1895, 2858, 3032, 3790, 5716, 7145, 7580, 11432, 14290, 15160, 28580, 57160, 541591, 1083182, 2166364, 2707955, 4332728, 5415910, 10831820, 21663640]

約数ペア:

[(1, 21663640), (2, 10831820), (4, 5415910), (5, 4332728), (8, 2707955), (10, 2166364), (20, 1083182), (40, 541591), (379, 57160), (758, 28580), (1429, 15160), (1516, 14290), (1895, 11432), (2858, 7580), (3032, 7145), (3790, 5716)]