Greatest Common Factor of 28, 54, 20, 215

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

• Greatest Common Factor of 28, 54, 20, 215 by common division method
• Greatest Common Factor of 28, 54, 20, 215 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 28

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

1,2,4,7,14,28

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 20

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

1,2,4,5,10,20

Factors of 215

List of positive integer factors of 215 that divides 215 without a remainder.

1,5,43,215

Greatest Common Factor

We found the factors 28,54,20,215 . The biggest common factor number is the GCF number.
So the greatest common factor 28,54,20,215 is 1.

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

• GCF of 30, 99, 26, 387
• GCF of 34, 36, 68, 346
• GCF of 65, 72, 77, 991
• GCF of 76, 68, 46, 290
• GCF of 11, 48, 72, 880

1. What is the GCF of 28, 54, 20, 215?

Answer: GCF of 28, 54, 20, 215 is 1.

2. How to Find the GCF of 28, 54, 20, 215

Answer: Greatest Common Factor(GCF) of 28, 54, 20, 215 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 54, 20, 215) = 1.