List all pairs of factors for each integer?

Question

I got this section of my test wrong, this is how i listed all pairs for 30: 10*3
5*2


It was marked wrong, and my teacher said I needed 7 more pairs. How do I do this?

Answer 1

(1,30)
(2,15)
(3,10)
(5,6)
(6,5)
(10,3)
(15,2)
(30,1)

Answer 2

Here are others....

5*6
6*5
10*3
3*10
15*2
2*15
30*1
1*30

Answer 3

1*30
30*1
2*15
15*2
3*10
10*3
5*6
6*5
That's all