20553495

素因数分解:

$3^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2131}}^1$

素因数の和:2782

約数の個数: 16

約数和(自身を含む): 32952192

約数和(自身を除く): 12398697

約数列:

[1, 3, 5, 15, 643, 1929, 2131, 3215, 6393, 9645, 10655, 31965, 1370233, 4110699, 6851165, 20553495]

約数ペア:

[(1, 20553495), (3, 6851165), (5, 4110699), (15, 1370233), (643, 31965), (1929, 10655), (2131, 9645), (3215, 6393)]