208775125

素因数分解:

$5^3\times {\mathrm{13}}^1\times {\mathrm{128477}}^1$

素因数の和:128505

約数の個数: 16

約数和(自身を含む): 280595952

約数和(自身を除く): 71820827

約数列:

[1, 5, 13, 25, 65, 125, 325, 1625, 128477, 642385, 1670201, 3211925, 8351005, 16059625, 41755025, 208775125]

約数ペア:

[(1, 208775125), (5, 41755025), (13, 16059625), (25, 8351005), (65, 3211925), (125, 1670201), (325, 642385), (1625, 128477)]