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The numbers that go into both -13 and 40 are 1 and -1. This is because the factors of -13 are 1, -1, 13, and -13, while the factors of 40 are 1, -1, 2, -2, 4, -4, 5, -5, 8, -8, 10, -10, 20, and -20. The only common factors between -13 and 40 are 1 and -1.

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3mo ago

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Wiki User

12y ago

The numbers are coprime, so the answer is 1.

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Q: What goes into -13 and 40?
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