-1
The 2 numbers that multiply together to equal 678 are 6 and 113.
-30
The two numbers that multiply to equal 166 are 2 and 83, since 2 × 83 = 166. Another pair of factors could be -2 and -83, as they also multiply to give 166.
2
280
The numbers are -2 and 28
1 and 4 2 and 2
-3+1
31 and 2
1025 and 2.
17
-6