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.
Factors multiply, like 1 x 11. Addends add, like 5 and 6.
71
35
3 & 8
When the "factors" of a number are listed, the list is usually restricted to positive factors. Then there would be no answer to the question, because no group of positive numbers can add up to make zero.
35
35
1 and 11
31
no 11 is not a perfect number because when u add the factors the don't add up to 11
The factors are 1 & 11 !