Greatest Common Factor of 20, 49, 54, 28

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

• Greatest Common Factor of 20, 49, 54, 28 by common division method
• Greatest Common Factor of 20, 49, 54, 28 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Factors of 54

List of positive integer factors of 54 that divides 54 without a remainder.

1,2,3,6,9,18,27,54

Factors of 28

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

1,2,4,7,14,28

Greatest Common Factor

We found the factors 20,49,54,28 . The biggest common factor number is the GCF number.
So the greatest common factor 20,49,54,28 is 1.

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

• GCF of 95, 97, 33, 25
• GCF of 31, 53, 43, 68
• GCF of 52, 95, 51, 98
• GCF of 62, 68, 59, 23
• GCF of 40, 49, 97, 52

1. What is the GCF of 20, 49, 54, 28?

Answer: GCF of 20, 49, 54, 28 is 1.

2. How to Find the GCF of 20, 49, 54, 28

Answer: Greatest Common Factor(GCF) of 20, 49, 54, 28 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 49, 54, 28) = 1.