What is the Greatest Common Factor of 220 and 240?

Greatest common factor (GCF) of 220 and 240 is 20.

GCF(220,240) = 20

We will now calculate the prime factors of 220 and 240, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 220 and 240.

How to find the GCF of 220 and 240?

We will first find the prime factorization of 220 and 240. After we will calculate the factors of 220 and 240 and find the biggest common factor number .

Step-1: Prime Factorization of 220

Prime factors of 220 are 2, 5, 11. Prime factorization of 220 in exponential form is:

220 = 2² × 5¹ × 11¹

Step-2: Prime Factorization of 240

Prime factors of 240 are 2, 3, 5. Prime factorization of 240 in exponential form is:

240 = 2⁴ × 3¹ × 5¹

Step-3: Factors of 220

List of positive integer factors of 220 that divides 220 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110

Step-4: Factors of 240

List of positive integer factors of 240 that divides 220 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 220 and 240. The biggest common factor number is the GCF number.
So the greatest common factor 220 and 240 is 20.

Also check out the Least Common Multiple of 220 and 240