21855639

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{691}}^1\times {\mathrm{811}}^1$

素因数の和:1518

約数の個数: 16

約数和(自身を含む): 31466624

約数和(自身を除く): 9610985

約数列:

[1, 3, 13, 39, 691, 811, 2073, 2433, 8983, 10543, 26949, 31629, 560401, 1681203, 7285213, 21855639]

約数ペア:

[(1, 21855639), (3, 7285213), (13, 1681203), (39, 560401), (691, 31629), (811, 26949), (2073, 10543), (2433, 8983)]