Greatest Common Factor of 9 and 27 by Prime Factorization

Given Numbers: 9, 27
Identify the Prime Factors of 9 and 27 by Prime Factorization
  • Prime Factorization of 9: 9 = 3 x 3 = 32
  • Prime Factorization of 27: 27 = 3 x 3 x 3 = 33

Determine the Prime Factor(s) that are common to the Prime Factorization of each number:

  • 3 is the only Prime Factor common to the Prime Factorizations of 9 and 27

Determine the least number of occurrences of 3 among the Prime Factorizations:

  • 3 occurs at least 2 times in each Prime Factorization

As a result, the Greatest Common Factor (GCF) of 9 and 27 is equal to 3 x 3, which equals 3 raised to the power of its least number of occurrences or smallest exponent among the Prime Factorizations:

  • GCF(9, 27) = 32 = 3 x 3
  • GCF(9, 27) = 9

Therefore, the Greatest Common Factor of 9 and 27 by Prime Factorization = 9

The solution above and other related solutions were provided by the GCF by Prime Factorization Application.