18875997

素因数分解:

$3^9\times 7^1\times {\mathrm{137}}^1$

素因数の和:171

約数の個数: 40

約数和(自身を含む): 32594496

約数和(自身を除く): 13718499

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 137, 189, 243, 411, 567, 729, 959, 1233, 1701, 2187, 2877, 3699, 5103, 6561, 8631, 11097, 15309, 19683, 25893, 33291, 45927, 77679, 99873, 137781, 233037, 299619, 699111, 898857, 2097333, 2696571, 6291999, 18875997]

約数ペア:

[(1, 18875997), (3, 6291999), (7, 2696571), (9, 2097333), (21, 898857), (27, 699111), (63, 299619), (81, 233037), (137, 137781), (189, 99873), (243, 77679), (411, 45927), (567, 33291), (729, 25893), (959, 19683), (1233, 15309), (1701, 11097), (2187, 8631), (2877, 6561), (3699, 5103)]