# What is the Greatest Common Factor of 28 and 32?

Greatest common factor (GCF) of 28 and 32 is **4**.

GCF(28,32) = 4

We will now calculate the prime factors of **28 and 32**, than find the greatest common factor *(greatest common divisor (gcd))* of the numbers by matching the biggest common factor of 28 and 32.

## How to find the GCF of 28 and 32?

We will first find the prime factorization of 28 and 32. After we will calculate the factors of 28 and 32 and find the biggest common factor number .

### Step-1: Prime Factorization of 28

Prime factors of 28 are 2, 7. Prime factorization of **28** in exponential form is:

28 = 2^{2} × 7^{1}

### Step-2: Prime Factorization of 32

Prime factors of 32 are 2. Prime factorization of **32** in exponential form is:

32 = 2^{5}

### Step-3: Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1, 2, 4, 7, 14

### Step-4: Factors of 32

List of positive integer factors of 32 that divides 28 without a remainder.

1, 2, 4, 8, 16

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 28 and 32. The biggest common factor number is the **GCF** number.

So the **greatest common factor 28 and 32** is **4**.

Also check out the Least Common Multiple of 28 and 32

## Recent Comments

This helps alot thank you guys so much god bless you

I suggest to give an option whether if the number we're looking for is odd or even,since it would help me.But I understand if you can't do it,since I'm being selfish and it would be hard since there are lots of numbers.