19161779

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 25038720

約数和(自身を除く): 5876941

約数列:

[1, 7, 13, 29, 53, 91, 137, 203, 371, 377, 689, 959, 1537, 1781, 2639, 3973, 4823, 7261, 10759, 12467, 19981, 27811, 50827, 51649, 94393, 139867, 210569, 361543, 660751, 1473983, 2737397, 19161779]

約数ペア:

[(1, 19161779), (7, 2737397), (13, 1473983), (29, 660751), (53, 361543), (91, 210569), (137, 139867), (203, 94393), (371, 51649), (377, 50827), (689, 27811), (959, 19981), (1537, 12467), (1781, 10759), (2639, 7261), (3973, 4823)]