19918821

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{26881}}^1$

素因数の和:26916

約数の個数: 16

約数和(自身を含む): 30107840

約数和(自身を除く): 10189019

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 26881, 80643, 349453, 510739, 1048359, 1532217, 6639607, 19918821]

約数ペア:

[(1, 19918821), (3, 6639607), (13, 1532217), (19, 1048359), (39, 510739), (57, 349453), (247, 80643), (741, 26881)]