20165665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{1559}}^1$

素因数の和:1776

約数の個数: 16

約数和(自身を含む): 26208000

約数和(自身を除く): 6042335

約数列:

[1, 5, 13, 65, 199, 995, 1559, 2587, 7795, 12935, 20267, 101335, 310241, 1551205, 4033133, 20165665]

約数ペア:

[(1, 20165665), (5, 4033133), (13, 1551205), (65, 310241), (199, 101335), (995, 20267), (1559, 12935), (2587, 7795)]