7 and 1 are two factors of seven.
7+1=8
167
They are 7 and 2
They are 7 and 2
The 8 factors of 56 are 1, 2, 4, 7, 8, 14, 28, and 56. 2 and 8 add up to 10. Also, 1, 2, and 7 add up to 10.
9
7 and 2
-13
5
15
91
119
The factors of 21 that add up to 8 are 1 and 7.