21538467

素因数分解:

$3^4\times {\mathrm{139}}^1\times {\mathrm{1913}}^1$

素因数の和:2064

約数の個数: 20

約数和(自身を含む): 32423160

約数和(自身を除く): 10884693

約数列:

[1, 3, 9, 27, 81, 139, 417, 1251, 1913, 3753, 5739, 11259, 17217, 51651, 154953, 265907, 797721, 2393163, 7179489, 21538467]

約数ペア:

[(1, 21538467), (3, 7179489), (9, 2393163), (27, 797721), (81, 265907), (139, 154953), (417, 51651), (1251, 17217), (1913, 11259), (3753, 5739)]