21804490

素因数分解:

$2^1\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{2161}}^1$

素因数の和:3177

約数の個数: 16

約数和(自身を含む): 39305160

約数和(自身を除く): 17500670

約数列:

[1, 2, 5, 10, 1009, 2018, 2161, 4322, 5045, 10090, 10805, 21610, 2180449, 4360898, 10902245, 21804490]

約数ペア:

[(1, 21804490), (2, 10902245), (5, 4360898), (10, 2180449), (1009, 21610), (2018, 10805), (2161, 10090), (4322, 5045)]