20128875

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{4129}}^1$

素因数の和:4160

約数の個数: 32

約数和(自身を含む): 36079680

約数和(自身を除く): 15950805

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 975, 1625, 4129, 4875, 12387, 20645, 53677, 61935, 103225, 161031, 268385, 309675, 516125, 805155, 1341925, 1548375, 4025775, 6709625, 20128875]

約数ペア:

[(1, 20128875), (3, 6709625), (5, 4025775), (13, 1548375), (15, 1341925), (25, 805155), (39, 516125), (65, 309675), (75, 268385), (125, 161031), (195, 103225), (325, 61935), (375, 53677), (975, 20645), (1625, 12387), (4129, 4875)]