19906909

素因数分解:

${\mathrm{11}}^1\times {\mathrm{71}}^2\times {\mathrm{359}}^1$

素因数の和:512

約数の個数: 12

約数和(自身を含む): 22088160

約数和(自身を除く): 2181251

約数列:

[1, 11, 71, 359, 781, 3949, 5041, 25489, 55451, 280379, 1809719, 19906909]

約数ペア:

[(1, 19906909), (11, 1809719), (71, 280379), (359, 55451), (781, 25489), (3949, 5041)]