1782║2
..891║3
..297║3
....99║3
....33║3
....11║11
......1
1782=2*3*3*3*3*11
--------------------------
2835║3
..945║3
..315║3
..105║3
....35║5
......7║7
......1
2835=3*3*3*3*5*7
------------------------
4928║2
2464║2
1232║2
..616║2
..308║2
..154║2
....77║7
....11║11
......1
4928=2*2*2*2*2*2*7*11