128768575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{12781}}^1$

素因数の和:12835

約数の個数: 24

約数和(自身を含む): 177516416

約数和(自身を除く): 48747841

約数列:

[1, 5, 13, 25, 31, 65, 155, 325, 403, 775, 2015, 10075, 12781, 63905, 166153, 319525, 396211, 830765, 1981055, 4153825, 5150743, 9905275, 25753715, 128768575]

約数ペア:

[(1, 128768575), (5, 25753715), (13, 9905275), (25, 5150743), (31, 4153825), (65, 1981055), (155, 830765), (325, 396211), (403, 319525), (775, 166153), (2015, 63905), (10075, 12781)]