21056031

素因数分解:

$3^4\times {\mathrm{191}}^1\times {\mathrm{1361}}^1$

素因数の和:1564

約数の個数: 20

約数和(自身を含む): 31641984

約数和(自身を除く): 10585953

約数列:

[1, 3, 9, 27, 81, 191, 573, 1361, 1719, 4083, 5157, 12249, 15471, 36747, 110241, 259951, 779853, 2339559, 7018677, 21056031]

約数ペア:

[(1, 21056031), (3, 7018677), (9, 2339559), (27, 779853), (81, 259951), (191, 110241), (573, 36747), (1361, 15471), (1719, 12249), (4083, 5157)]