Greatest Common Factor of 28, 16, 90, 64

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 28, 16, 90, 64 by common division method
• Greatest Common Factor of 28, 16, 90, 64 with matching the biggest common factor

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∴ So the GCF of the given numbers is 2 = 2

Factors of 28

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

1,2,4,7,14,28

Factors of 16

List of positive integer factors of 16 that divides 16 without a remainder.

1,2,4,8,16

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Greatest Common Factor

We found the factors 28,16,90,64 . The biggest common factor number is the GCF number.
So the greatest common factor 28,16,90,64 is 2.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 77, 18, 44, 44
• GCF of 61, 75, 40, 15
• GCF of 24, 18, 93, 92
• GCF of 80, 11, 25, 81
• GCF of 90, 91, 56, 60

1. What is the GCF of 28, 16, 90, 64?

Answer: GCF of 28, 16, 90, 64 is 2.

2. How to Find the GCF of 28, 16, 90, 64

Answer: Greatest Common Factor(GCF) of 28, 16, 90, 64 = 2

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(28, 16, 90, 64) = 2.