Greatest Common Factor of 21, 39, 67, 56

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

• Greatest Common Factor of 21, 39, 67, 56 by common division method
• Greatest Common Factor of 21, 39, 67, 56 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 21

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

1,3,7,21

Factors of 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 67

List of positive integer factors of 67 that divides 67 without a remainder.

1,67

Factors of 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Greatest Common Factor

We found the factors 21,39,67,56 . The biggest common factor number is the GCF number.
So the greatest common factor 21,39,67,56 is 1.

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

• GCF of 29, 60, 51, 89
• GCF of 28, 73, 54, 10
• GCF of 88, 58, 80, 14
• GCF of 90, 33, 16, 20
• GCF of 85, 42, 99, 86

1. What is the GCF of 21, 39, 67, 56?

Answer: GCF of 21, 39, 67, 56 is 1.

2. How to Find the GCF of 21, 39, 67, 56

Answer: Greatest Common Factor(GCF) of 21, 39, 67, 56 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 39, 67, 56) = 1.