20403988

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{42157}}^1$

素因数の和:42183

約数の個数: 18

約数和(自身を含む): 39249098

約数和(自身を除く): 18845110

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 42157, 84314, 168628, 463727, 927454, 1854908, 5100997, 10201994, 20403988]

約数ペア:

[(1, 20403988), (2, 10201994), (4, 5100997), (11, 1854908), (22, 927454), (44, 463727), (121, 168628), (242, 84314), (484, 42157)]