Respostas

2014-05-27T20:27:20-03:00
28 | 2
14 | 2
  7 | 7
  1 | 

28 = 2 x 2 x 7

45 | 3
15 | 3
  5 | 5
  1 | 

45 = 3 x 3 x 5

72 | 2
36 | 2
18 | 2
  9 | 3
  3 | 3

72 = 2 x 2 x 2 x 3 x 3
1 5 1
2014-05-27T20:35:43-03:00
28/2=14 
14/7= 2
2/2= 1

45/5 =9
9/3= 3
3/3=
1

72/2= 36
36/2= 18
18/2= 9
9/3= 3
3/3=1