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.
23
-7585
-355
Factors multiply, like 1 x 11. Addends add, like 5 and 6.
23
341
268
715
5 and -6 2 and -3 1 and -2
23
Factors of 250 that add up to 8 = 1 + 2 + 5