21311289

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{11117}}^1$

素因数の和:11197

約数の個数: 16

約数和(自身を含む): 32019840

約数和(自身を除く): 10708551

約数列:

[1, 3, 9, 27, 71, 213, 639, 1917, 11117, 33351, 100053, 300159, 789307, 2367921, 7103763, 21311289]

約数ペア:

[(1, 21311289), (3, 7103763), (9, 2367921), (27, 789307), (71, 300159), (213, 100053), (639, 33351), (1917, 11117)]