4 and 16
5 and 15
8 and 12
10 and 10
four fives
five fours
ten twos
twenty ones
The factors of 8 are 1, 2, 4, and 8. The factors that add up to 10 are 2 and 8.
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
268
527
171
31
26
34
15 and 4 are the factors of 120 that add up to 19.
79
-13
146
34
115
-43
-10 and 2 -12 and 4 -20 and 12
-355