21198879

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{409}}^1\times {\mathrm{443}}^1$

素因数の和:871

約数の個数: 24

約数和(自身を含む): 33131280

約数和(自身を除く): 11932401

約数列:

[1, 3, 9, 13, 39, 117, 409, 443, 1227, 1329, 3681, 3987, 5317, 5759, 15951, 17277, 47853, 51831, 181187, 543561, 1630683, 2355431, 7066293, 21198879]

約数ペア:

[(1, 21198879), (3, 7066293), (9, 2355431), (13, 1630683), (39, 543561), (117, 181187), (409, 51831), (443, 47853), (1227, 17277), (1329, 15951), (3681, 5759), (3987, 5317)]