178164025

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{42169}}^1$

素因数の和:42205

約数の個数: 18

約数和(自身を含む): 239230410

約数和(自身を除く): 61066385

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 42169, 210845, 548197, 1054225, 2740985, 7126561, 13704925, 35632805, 178164025]

約数ペア:

[(1, 178164025), (5, 35632805), (13, 13704925), (25, 7126561), (65, 2740985), (169, 1054225), (325, 548197), (845, 210845), (4225, 42169)]