251875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:64

約数の個数: 20

約数和(自身を含む): 349888

約数和(自身を除く): 98013

約数列:

[1, 5, 13, 25, 31, 65, 125, 155, 325, 403, 625, 775, 1625, 2015, 3875, 8125, 10075, 19375, 50375, 251875]

約数ペア:

[(1, 251875), (5, 50375), (13, 19375), (25, 10075), (31, 8125), (65, 3875), (125, 2015), (155, 1625), (325, 775), (403, 625)]