The factors of -504 are 2, 2, 2, 3, 3, 7 and -1. Then the factors that add to -3 are -24 and 21.
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.
The prime factors of 40 are 2, 2, 2, 5 2 x 2 x 2 x 5 = 40
-156
Here are the prime factors of the numbers... 40 - 1 2 2 2 and 5 72 - 1 2 2 2 3 and 3 32 - 1 2 2 2 2 and 2 64 - 1 2 2 2 2 2 and 2 the common prime factors are 2 and 3
8 and 5
487
-20 and 2
The factors of 8 are 1, 2, 4, and 8. The factors that add up to 10 are 2 and 8.
31
factors of 30 that add to 17 are 2 and 15
-1005
167
The factors of -504 are 2, 2, 2, 3, 3, 7 and -1. Then the factors that add to -3 are -24 and 21.
23
Factors of 250 that add up to 8 = 1 + 2 + 5
212