21243981

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{9067}}^1$

素因数の和:9152

約数の個数: 16

約数和(自身を含む): 31339008

約数和(自身を除く): 10095027

約数列:

[1, 3, 11, 33, 71, 213, 781, 2343, 9067, 27201, 99737, 299211, 643757, 1931271, 7081327, 21243981]

約数ペア:

[(1, 21243981), (3, 7081327), (11, 1931271), (33, 643757), (71, 299211), (213, 99737), (781, 27201), (2343, 9067)]