1, 2, 3, 6, 23, 46, 69, 138
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There are not common factors of 138 because there cannot be common factors without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The factors of 138 are 1, 2, 3, 6, 23, 46, 69, and 138.
The common factors of 69 and 138 are: 1, 3, 23, and 69
138 is a composite number because it has factors other than 1 and itself. It is not a prime number. The 8 factors of 138 are 1, 2, 3, 6, 23, 46, 69, and 138. The prime factors of 138 are 2, 3, and 23. The prime factorization of 138 is 2 x 3 x 23. NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.
2 x 3 x 23 = 138
The factors of 276 are 1, 2, 3, 4, 6, 12, 23, 46, 69, 92, 138, and 276.