66209975

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{15671}}^1$

素因数の和:15707

約数の個数: 18

約数和(自身を含む): 88907256

約数和(自身を除く): 22697281

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 15671, 78355, 203723, 391775, 1018615, 2648399, 5093075, 13241995, 66209975]

約数ペア:

[(1, 66209975), (5, 13241995), (13, 5093075), (25, 2648399), (65, 1018615), (169, 391775), (325, 203723), (845, 78355), (4225, 15671)]