1213125

素因数分解:

$3^1\times 5^4\times {\mathrm{647}}^1$

素因数の和:670

約数の個数: 20

約数和(自身を含む): 2024352

約数和(自身を除く): 811227

約数列:

[1, 3, 5, 15, 25, 75, 125, 375, 625, 647, 1875, 1941, 3235, 9705, 16175, 48525, 80875, 242625, 404375, 1213125]

約数ペア:

[(1, 1213125), (3, 404375), (5, 242625), (15, 80875), (25, 48525), (75, 16175), (125, 9705), (375, 3235), (625, 1941), (647, 1875)]