-42
40 & -2
40 + -2 = 38
40 x -2 = -80
38
If you've written that correctly, there aren't two whole numbers that satisfy your conditions. -30 and 2 multiply to -60, but they add to -28.
-38
19*2
38 and 8
1 x 38, 2 x 19
38
577
38
10 + 28 are two triangle numbers that, added together total 38.
38
108