21512478

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{709}}^1$

素因数の和:1116

約数の個数: 32

約数和(自身を含む): 46519200

約数和(自身を除く): 25006722

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 389, 709, 778, 1167, 1418, 2127, 2334, 4254, 5057, 9217, 10114, 15171, 18434, 27651, 30342, 55302, 275801, 551602, 827403, 1654806, 3585413, 7170826, 10756239, 21512478]

約数ペア:

[(1, 21512478), (2, 10756239), (3, 7170826), (6, 3585413), (13, 1654806), (26, 827403), (39, 551602), (78, 275801), (389, 55302), (709, 30342), (778, 27651), (1167, 18434), (1418, 15171), (2127, 10114), (2334, 9217), (4254, 5057)]