Greatest Common Factor of 36, 54 and 90 by Prime Factorization

Given Numbers: 36, 54, 90
Identify the Prime Factors of 36, 54 and 90 by Prime Factorization
  • Prime Factorization of 36: 36 = 2 x 2 x 3 x 3 = 22 x 32
  • Prime Factorization of 54: 54 = 2 x 3 x 3 x 3 = 21 x 33
  • Prime Factorization of 90: 90 = 2 x 3 x 3 x 5 = 21 x 32 x 51

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

  • 2 and 3 are Prime Factors common to the Prime Factorizations of 36, 54 and 90

Determine the least number of occurrences of 2 and 3 among the Prime Factorizations:

  • 2 occurs at least 1 time in each Prime Factorization
  • 3 occurs at least 2 times in each Prime Factorization

As a result, the Greatest Common Factor (GCF) of 36, 54 and 90 is equal to 2 x 3 x 3, which equals the product of 2 and 3 raised to the powers of their least number of occurrences or smallest exponent among the Prime Factorizations:

  • GCF(36, 54, 90) = 21 x 32 = 2 x 3 x 3
  • GCF(36, 54, 90) = 2 x 9
  • GCF(36, 54, 90) = 18

Therefore, the Greatest Common Factor of 36, 54 and 90 by Prime Factorization = 18

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