20600721

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{313}}^1$

素因数の和:493

約数の個数: 24

約数和(自身を含む): 30566016

約数和(自身を除く): 9965295

約数列:

[1, 3, 9, 71, 103, 213, 309, 313, 639, 927, 939, 2817, 7313, 21939, 22223, 32239, 65817, 66669, 96717, 200007, 290151, 2288969, 6866907, 20600721]

約数ペア:

[(1, 20600721), (3, 6866907), (9, 2288969), (71, 290151), (103, 200007), (213, 96717), (309, 66669), (313, 65817), (639, 32239), (927, 22223), (939, 21939), (2817, 7313)]