31
Factors are multiplied, not added. The question needs to be something like, "Which two factors of thirty add up to 11?" The answer would then be 5 and 6.
26
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.
Factors multiply, like 1 x 11. Addends add, like 5 and 6.
34
no 11 is not a perfect number because when u add the factors the don't add up to 11
15 and 4 are the factors of 120 that add up to 19.
79
-589
146
-13
35