20290309

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 23716800

約数和(自身を除く): 3426491

約数列:

[1, 13, 19, 71, 89, 169, 247, 923, 1157, 1349, 1691, 3211, 6319, 11999, 15041, 17537, 21983, 82147, 120061, 227981, 285779, 1067911, 1560793, 20290309]

約数ペア:

[(1, 20290309), (13, 1560793), (19, 1067911), (71, 285779), (89, 227981), (169, 120061), (247, 82147), (923, 21983), (1157, 17537), (1349, 15041), (1691, 11999), (3211, 6319)]