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What is the GCF of 1225 and 5390?

The GCF of 1225 and 5390 is 245.

Steps to find GCF

  1. Find the prime factorization of 1225
    1225 = 5 × 5 × 7 × 7
  2. Find the prime factorization of 5390
    5390 = 2 × 5 × 7 × 7 × 11
  3. To find the GCF, multiply all the prime factors common to both numbers:

    Therefore, GCF = 5 × 7 × 7
  4. GCF = 245

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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).

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