20 and 4
16 and 8
14 and 10
three eights
six fours
twelve twos
twenty-four ones
15 and 4 are the factors of 120 that add up to 19.
262
8x3
-38
They are 8 and 6
-156
24 and -1616 and -812 and -4
35
The factors of -504 are 2, 2, 2, 3, 3, 7 and -1. Then the factors that add to -3 are -24 and 21.
0
Factors multiply, like 4 and 6 or 3 and 8 or 2 and 12.
There are no whole factors of 360 that add to -48, however: (-24 - 6√6) & (-24 + 6√6) ≈ -38.697 & -9.303 will add to -48 and multiply to 360.