21050471

素因数分解:

${\mathrm{13}}^2\times {\mathrm{17}}^2\times {\mathrm{431}}^1$

素因数の和:491

約数の個数: 18

約数和(自身を含む): 24270192

約数和(自身を除く): 3219721

約数列:

[1, 13, 17, 169, 221, 289, 431, 2873, 3757, 5603, 7327, 48841, 72839, 95251, 124559, 1238263, 1619267, 21050471]

約数ペア:

[(1, 21050471), (13, 1619267), (17, 1238263), (169, 124559), (221, 95251), (289, 72839), (431, 48841), (2873, 7327), (3757, 5603)]