21800042

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{9811}}^1$

素因数の和:9925

約数の個数: 16

約数和(自身を含む): 36029664

約数和(自身を除く): 14229622

約数列:

[1, 2, 11, 22, 101, 202, 1111, 2222, 9811, 19622, 107921, 215842, 990911, 1981822, 10900021, 21800042]

約数ペア:

[(1, 21800042), (2, 10900021), (11, 1981822), (22, 990911), (101, 215842), (202, 107921), (1111, 19622), (2222, 9811)]