0
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They are: 2+3 = 5
23
Factors of 250 that add up to 8 = 1 + 2 + 5
-245
35
243
1012
212
31
The factors of -35 are 1, -1, 5, -5, 7, -7, 35, -35 No two of them add up to -13.
268
The factors of 35 are 1, 5, 7 and 35. None of them add up to -5.
5