21218345

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{1499}}^1$

素因数の和:1672

約数の個数: 16

約数和(自身を含む): 27000000

約数和(自身を除く): 5781655

約数列:

[1, 5, 19, 95, 149, 745, 1499, 2831, 7495, 14155, 28481, 142405, 223351, 1116755, 4243669, 21218345]

約数ペア:

[(1, 21218345), (5, 4243669), (19, 1116755), (95, 223351), (149, 142405), (745, 28481), (1499, 14155), (2831, 7495)]