Răspuns :
45 = 9 × 5
9 = 3 × 3
40 = 5 × 8
8 = 4 × 2
30 = 6 × 5
6 = 2 × 3
50 = 10 × 5
10 = 2 × 5
5 = 5 × 1
20 = 4 × 5
4 = 2 × 2
5 = 1 × 5
45 = 9 × 5
9 = 3 × 3
40 = 5 × 8
8 = 4 × 2
30 = 6 × 5
6 = 2 × 3
50 = 10 × 5
10 = 2 × 5
5 = 5 × 1
20 = 4 × 5
4 = 2 × 2
5 = 1 × 5