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.
240 The three is in the tens place.
-144
The four factors of 33 add up to 48.
212
31
140
240 The three is in the tens place.
15 x -16 = -240 15 + -16 = -1
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.
-144
-1005
167
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
factors of 30 that add to 17 are 2 and 15
268