991328871

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{647}}^1\times {\mathrm{2311}}^1$

素因数の和:2991

約数の個数: 32

約数和(自身を含む): 1510161408

約数和(自身を除く): 518832537

約数列:

[1, 3, 13, 17, 39, 51, 221, 647, 663, 1941, 2311, 6933, 8411, 10999, 25233, 30043, 32997, 39287, 90129, 117861, 142987, 428961, 510731, 1495217, 1532193, 4485651, 19437821, 25418689, 58313463, 76256067, 330442957, 991328871]

約数ペア:

[(1, 991328871), (3, 330442957), (13, 76256067), (17, 58313463), (39, 25418689), (51, 19437821), (221, 4485651), (647, 1532193), (663, 1495217), (1941, 510731), (2311, 428961), (6933, 142987), (8411, 117861), (10999, 90129), (25233, 39287), (30043, 32997)]