18639873

素因数分解:

$3^2\times 7^1\times {\mathrm{295871}}^1$

素因数の和:295884

約数の個数: 12

約数和(自身を含む): 30770688

約数和(自身を除く): 12130815

約数列:

[1, 3, 7, 9, 21, 63, 295871, 887613, 2071097, 2662839, 6213291, 18639873]

約数ペア:

[(1, 18639873), (3, 6213291), (7, 2662839), (9, 2071097), (21, 887613), (63, 295871)]