17980721

素因数分解:

${\mathrm{11}}^2\times {\mathrm{181}}^1\times {\mathrm{821}}^1$

素因数の和:1024

約数の個数: 12

約数和(自身を含む): 19897332

約数和(自身を除く): 1916611

約数列:

[1, 11, 121, 181, 821, 1991, 9031, 21901, 99341, 148601, 1634611, 17980721]

約数ペア:

[(1, 17980721), (11, 1634611), (121, 148601), (181, 99341), (821, 21901), (1991, 9031)]