Greatest Common Factor of 28, 84, 80, 615

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

• Greatest Common Factor of 28, 84, 80, 615 by common division method
• Greatest Common Factor of 28, 84, 80, 615 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 84

List of positive integer factors of 84 that divides 84 without a remainder.

1,2,3,4,6,7,12,14,21,28,42,84

Factors of 80

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

1,2,4,5,8,10,16,20,40,80

Factors of 615

List of positive integer factors of 615 that divides 615 without a remainder.

1,3,5,15,41,123,205,615

Greatest Common Factor

We found the factors 28,84,80,615 . The biggest common factor number is the GCF number.
So the greatest common factor 28,84,80,615 is 1.

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

• GCF of 59, 96, 41, 691
• GCF of 98, 31, 55, 352
• GCF of 37, 74, 93, 227
• GCF of 93, 98, 75, 269
• GCF of 90, 18, 20, 377

1. What is the GCF of 28, 84, 80, 615?

Answer: GCF of 28, 84, 80, 615 is 1.

2. How to Find the GCF of 28, 84, 80, 615

Answer: Greatest Common Factor(GCF) of 28, 84, 80, 615 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 84, 80, 615) = 1.