Since 19 is a Prime number, it only has two factors - 1 and 19.
The factors of -60 that add up to 17 are 20 and -3. When you multiply 20 and -3, you get -60, and when you add them together, you get 17. Therefore, the pair of factors you are looking for is 20 and -3.
31
34
26
The two factors of 20 that add up to 6 are not whole numbers. The factors of 20 are 1, 2, 4, 5, 10, and 20, but none of these pairs add up to 6. If you're looking for two numbers that multiply to 20 and add up to 6, they would be 2 and -10, since 2 × (-10) = -20 and 2 + (-10) = -8, which is not applicable either. Therefore, there are no two factors of 20 that meet the criteria of adding up to 6.
79
-20 and 2
First list the factors of each. For 18, that's 1, 2, 3, 6, 9, and 18. For 20, that's 1, 2, 4, 5, 10, and 20. From these, you could add all of the factors of 18 to get 39. Or you could add 20, 10, and 9. Or 20, 10, 5, and 4. Or . . . you get the idea.
15 and 4 are the factors of 120 that add up to 19.
146
-13
1, 4, and 20. There are other factors, too.