21891640

素因数分解:

$2^3\times 5^1\times {\mathrm{547291}}^1$

素因数の和:547302

約数の個数: 16

約数和(自身を含む): 49256280

約数和(自身を除く): 27364640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547291, 1094582, 2189164, 2736455, 4378328, 5472910, 10945820, 21891640]

約数ペア:

[(1, 21891640), (2, 10945820), (4, 5472910), (5, 4378328), (8, 2736455), (10, 2189164), (20, 1094582), (40, 547291)]