-96
-360
2 * 2 * 2 * 2 *5 = 80 there isn't any
The factors of 21 that add up to 8 are 1 and 7.
None. Factors don't add, they multiply.
The factors of 8 are 1, 2, 4, and 8. The factors that add up to 10 are 2 and 8.
Factors multiply. The same set of numbers won't add up to both 140 and 240, but 120 and 20 are factors of 240 that total 140.
51 + 29 = 80
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
-1005
167
268