12 is one of them
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The composite numbers less than 16 that have exactly 4 factors are 6, 9, and 14. Their factors are as follows: 6: 1, 2, 3, 6 9: 1, 3, 9 14: 1, 2, 7, 14
The only composite factor of 14 is 14.
The only composite factor of 14 is 14.
Composite numbers less than 20 are 4, 6, 8, 9, 10, 12, 14, 15, 16 and 18.
composite