21137919

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{919}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 33384960

約数和(自身を除く): 12247041

約数列:

[1, 3, 11, 17, 33, 41, 51, 123, 187, 451, 561, 697, 919, 1353, 2091, 2757, 7667, 10109, 15623, 23001, 30327, 37679, 46869, 113037, 171853, 414469, 515559, 640543, 1243407, 1921629, 7045973, 21137919]

約数ペア:

[(1, 21137919), (3, 7045973), (11, 1921629), (17, 1243407), (33, 640543), (41, 515559), (51, 414469), (123, 171853), (187, 113037), (451, 46869), (561, 37679), (697, 30327), (919, 23001), (1353, 15623), (2091, 10109), (2757, 7667)]