21740157

素因数分解:

$3^4\times {\mathrm{239}}^1\times {\mathrm{1123}}^1$

素因数の和:1374

約数の個数: 20

約数和(自身を含む): 32640960

約数和(自身を除く): 10900803

約数列:

[1, 3, 9, 27, 81, 239, 717, 1123, 2151, 3369, 6453, 10107, 19359, 30321, 90963, 268397, 805191, 2415573, 7246719, 21740157]

約数ペア:

[(1, 21740157), (3, 7246719), (9, 2415573), (27, 805191), (81, 268397), (239, 90963), (717, 30321), (1123, 19359), (2151, 10107), (3369, 6453)]