What is the sum of all negative factors of 105?

Question

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Answer 1

normally, we factor composite numbers such as this with only positive factors.

 

The unique prime factorization of 105 is 3•5•7; to me the question is unclear. Negative factors could be assigned (two negatives, the other positive) in various ways, and composite factors could be 15, 35 and 21. 

 

 

Answer 2

105: 3, 5, 7

 

Not all of them can be negative. Check the conditions of the problem