81945005

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{12149}}^1$

素因数の和:12244

約数の個数: 16

約数和(自身を含む): 104976000

約数和(自身を除く): 23030995

約数列:

[1, 5, 19, 71, 95, 355, 1349, 6745, 12149, 60745, 230831, 862579, 1154155, 4312895, 16389001, 81945005]

約数ペア:

[(1, 81945005), (5, 16389001), (19, 4312895), (71, 1154155), (95, 862579), (355, 230831), (1349, 60745), (6745, 12149)]