74398025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17609}}^1$

素因数の和:17645

約数の個数: 18

約数和(自身を含む): 99901530

約数和(自身を除く): 25503505

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 17609, 88045, 228917, 440225, 1144585, 2975921, 5722925, 14879605, 74398025]

約数ペア:

[(1, 74398025), (5, 14879605), (13, 5722925), (25, 2975921), (65, 1144585), (169, 440225), (325, 228917), (845, 88045), (4225, 17609)]