Greatest Common Factor of 57, 58, 28, 21, 85

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

• Greatest Common Factor of 57, 58, 28, 21, 85 by common division method
• Greatest Common Factor of 57, 58, 28, 21, 85 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 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 58

List of positive integer factors of 58 that divides 58 without a remainder.

1,2,29,58

Factors of 28

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

1,2,4,7,14,28

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Greatest Common Factor

We found the factors 57,58,28,21,85 . The biggest common factor number is the GCF number.
So the greatest common factor 57,58,28,21,85 is 1.

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

• GCF of 77, 56, 79, 75, 84
• GCF of 75, 71, 62, 53, 77
• GCF of 67, 68, 81, 91, 44
• GCF of 84, 56, 67, 51, 97
• GCF of 67, 47, 75, 80, 40

1. What is the GCF of 57, 58, 28, 21, 85?

Answer: GCF of 57, 58, 28, 21, 85 is 1.

2. How to Find the GCF of 57, 58, 28, 21, 85

Answer: Greatest Common Factor(GCF) of 57, 58, 28, 21, 85 = 1

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

Step 2: Then multiply all the prime factors GCF(57, 58, 28, 21, 85) = 1.