The factors of 454 are 1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 125,
135, 225, 243, 375, 405, 625, 675, 729, 1125, 1215, 1875, 2025,
2187, 3375, 3645, 5625, 6075, 6561, 10125, 10935, 16875, 18225,
30375, 32805, 50625, 54675, 91125, 151875, 164025, 273375, 455625,
820125, 1366875, 4100625.
For them to be common, they need to be compared to another set
of factors.