1 2 3 6 9 18
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The factors of 18 are 1,2,3,6,9 and 18. For them to be common, they need to be compared to another set of factors.
Factors of 18: 1,2,3,6,9,18 Factors of 42: 1,2,3,6,7,14,21,42 Factors of both: 1,2,3,6
The factors of 18 are 1,2,3,6,9 and 18. For them to be common, they need to be compared to another set of factors.
The factors of -18 are 1, 2, 3, 6, 9, 18 and their negative counterparts. The prime factors are 2 and 3.
The factors of 18 are 1, 2, 3, 6, 9, and 18. The prime factors are 2 x 3 x 3. 18 is a composite number.