21238390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{111781}}^1$

素因数の和:111807

約数の個数: 16

約数和(自身を含む): 40241520

約数和(自身を除く): 19003130

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 111781, 223562, 558905, 1117810, 2123839, 4247678, 10619195, 21238390]

約数ペア:

[(1, 21238390), (2, 10619195), (5, 4247678), (10, 2123839), (19, 1117810), (38, 558905), (95, 223562), (190, 111781)]