# What is the Greatest Common Factor of 60 and 80?

Greatest common factor (GCF) of 60 and 80 is 20.

GCF(60,80) = 20

We will now calculate the prime factors of 60 and 80, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 60 and 80.

GCF Calculator and
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## How to find the GCF of 60 and 80?

We will first find the prime factorization of 60 and 80. After we will calculate the factors of 60 and 80 and find the biggest common factor number .

### Step-1: Prime Factorization of 60

Prime factors of 60 are 2, 3, 5. Prime factorization of 60 in exponential form is:

60 = 22 × 31 × 51

### Step-2: Prime Factorization of 80

Prime factors of 80 are 2, 5. Prime factorization of 80 in exponential form is:

80 = 24 × 51

### Step-3: Factors of 60

List of positive integer factors of 60 that divides 60 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30

### Step-4: Factors of 80

List of positive integer factors of 80 that divides 60 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 60 and 80. The biggest common factor number is the GCF number.
So the greatest common factor 60 and 80 is 20.

Also check out the Least Common Multiple of 60 and 80