21275891

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{809}}^1$

素因数の和:863

約数の個数: 24

約数和(自身を含む): 27851040

約数和(自身を除く): 6575149

約数列:

[1, 7, 13, 17, 91, 119, 221, 289, 809, 1547, 2023, 3757, 5663, 10517, 13753, 26299, 73619, 96271, 178789, 233801, 1251523, 1636607, 3039413, 21275891]

約数ペア:

[(1, 21275891), (7, 3039413), (13, 1636607), (17, 1251523), (91, 233801), (119, 178789), (221, 96271), (289, 73619), (809, 26299), (1547, 13753), (2023, 10517), (3757, 5663)]