What is the Greatest Common Factor of 720 and 735?

Greatest common factor (GCF) of 720 and 735 is 15.

GCF(720,735) = 15

We will now calculate the prime factors of 720 and 735, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 720 and 735.

How to find the GCF of 720 and 735?

We will first find the prime factorization of 720 and 735. After we will calculate the factors of 720 and 735 and find the biggest common factor number .

Step-1: Prime Factorization of 720

Prime factors of 720 are 2, 3, 5. Prime factorization of 720 in exponential form is:

720 = 2⁴ × 3² × 5¹

Step-2: Prime Factorization of 735

Prime factors of 735 are 3, 5, 7. Prime factorization of 735 in exponential form is:

735 = 3¹ × 5¹ × 7²

Step-3: Factors of 720

List of positive integer factors of 720 that divides 720 without a remainder.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360

Step-4: Factors of 735

List of positive integer factors of 735 that divides 720 without a remainder.

1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 720 and 735. The biggest common factor number is the GCF number.
So the greatest common factor 720 and 735 is 15.

Also check out the Least Common Multiple of 720 and 735