15 and 4 are the factors of 120 that add up to 19.
113
The factors of 21 that add up to 8 are 1 and 7.
19 and 19
factors of 30 that add to 17 are 2 and 15
No, 3 is a factor of both. Note that the digits of 120 add up to 3 and those of 147 add up to 12. Both are multiples of 3 so the numbers 120 s and 147 are divisible by 3 and not relatively prime
The factors that multiply to 120 and add up to -8 are -12 and 10. This is because when you multiply -12 and 10, you get -120, and when you add them together, you get -8. Thus, the pair of factors you are looking for is (-12, 10).
47
146
-1, 6 and -12.
139
91
Since 19 is a prime number, it only has two factors - 1 and 19.
-10 and 2 -12 and 4 -20 and 12
154
-19
113
134