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Q: Can a number have more than 4 factor pairs?

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12 and 18 have three factor pairs.

The number 18.

composite

Common factor requires more than one number.

24 and 49 are relatively prime. Their only common factor is 1. All the other pairs have more than the number 1 as a common factor.

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80 has 5 factor pairs.

All of the composite numbers less than 100 have factor pairs.

12 and 18 have three factor pairs.

12 and 18 have three factor pairs.

The number 18.

12 and 18

12, 16, 18

Twenty only has three factor pairs. (20,1)(10,2)(5,4)

A number with more than one factor is normal, since all numbers except 0 and 1 have more than one factor. A number with more than two factors is composite.

24 does.

A number with more than one factor is normal, since all numbers except 0 and 1 have more than one factor. A number with more than two factors is composite.

18 = 1x18, 18 = 2x9, and 18 = 3x6

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