20689042

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{9311}}^1$

素因数の和:9425

約数の個数: 16

約数和(自身を含む): 34193664

約数和(自身を除く): 13504622

約数列:

[1, 2, 11, 22, 101, 202, 1111, 2222, 9311, 18622, 102421, 204842, 940411, 1880822, 10344521, 20689042]

約数ペア:

[(1, 20689042), (2, 10344521), (11, 1880822), (22, 940411), (101, 204842), (202, 102421), (1111, 18622), (2222, 9311)]