Question 73749
the factors of -180 are:
-1 & 180 
1 & -180
-2 & 90
2 & -90
-3 & 60
3 & -60
-4 & 45
4 & -45
-5 & 36
5 & -36
-6 & 30
6 & -30
-9 & 20
9 & -20
-10 & 18
10 & -18
-12 & 15
12 & -15