81768215

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{797}}^1$

素因数の和:907

約数の個数: 24

約数和(自身を含む): 105833952

約数和(自身を除く): 24065737

約数列:

[1, 5, 17, 71, 85, 289, 355, 797, 1207, 1445, 3985, 6035, 13549, 20519, 56587, 67745, 102595, 230333, 282935, 961979, 1151665, 4809895, 16353643, 81768215]

約数ペア:

[(1, 81768215), (5, 16353643), (17, 4809895), (71, 1151665), (85, 961979), (289, 282935), (355, 230333), (797, 102595), (1207, 67745), (1445, 56587), (3985, 20519), (6035, 13549)]