81960125

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1627}}^1$

素因数の和:1686

約数の個数: 32

約数和(自身を含む): 113777664

約数和(自身を除く): 31817539

約数列:

[1, 5, 13, 25, 31, 65, 125, 155, 325, 403, 775, 1625, 1627, 2015, 3875, 8135, 10075, 21151, 40675, 50375, 50437, 105755, 203375, 252185, 528775, 655681, 1260925, 2643875, 3278405, 6304625, 16392025, 81960125]

約数ペア:

[(1, 81960125), (5, 16392025), (13, 6304625), (25, 3278405), (31, 2643875), (65, 1260925), (125, 655681), (155, 528775), (325, 252185), (403, 203375), (775, 105755), (1625, 50437), (1627, 50375), (2015, 40675), (3875, 21151), (8135, 10075)]