21330459

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{3709}}^1$

素因数の和:3792

約数の個数: 20

約数和(自身を含む): 32321520

約数和(自身を除く): 10991061

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 3709, 5751, 11127, 33381, 100143, 263339, 300429, 790017, 2370051, 7110153, 21330459]

約数ペア:

[(1, 21330459), (3, 7110153), (9, 2370051), (27, 790017), (71, 300429), (81, 263339), (213, 100143), (639, 33381), (1917, 11127), (3709, 5751)]