Solutions by » GCF of two numbers

What is the GCF of 3521 and 1785?

The GCF of 3521 and 1785 is 7.

Steps to find GCF

  1. Find the prime factorization of 3521
    3521 = 7 × 503
  2. Find the prime factorization of 1785
    1785 = 3 × 5 × 7 × 17
  3. To find the GCF, multiply all the prime factors common to both numbers:

    Therefore, GCF = 7

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