21191157

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2551}}^1$

素因数の和:2641

約数の個数: 24

約数和(自身を含む): 33441408

約数和(自身を除く): 12250251

約数列:

[1, 3, 9, 13, 39, 71, 117, 213, 639, 923, 2551, 2769, 7653, 8307, 22959, 33163, 99489, 181121, 298467, 543363, 1630089, 2354573, 7063719, 21191157]

約数ペア:

[(1, 21191157), (3, 7063719), (9, 2354573), (13, 1630089), (39, 543363), (71, 298467), (117, 181121), (213, 99489), (639, 33163), (923, 22959), (2551, 8307), (2769, 7653)]