83
440
736
If you mean to -720 then the numbers are 36 and -20
64
-10 and 2
The numbers are: -1 and -20
-96
How about: 1*4*5 = 20
The numbers are: 24 and -4
83
7 + 13 = 20 Note that there are no two prime numbers x and y that multiply to 20.
440
-115
The numbers are: 20 and -48
20 = 2 x 2 x 5
20 = 2 x 2 x 5