Greatest Common Factor of 64, 21, 56, 6, 15

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

• Greatest Common Factor of 64, 21, 56, 6, 15 by common division method
• Greatest Common Factor of 64, 21, 56, 6, 15 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 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Factors of 21

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

1,3,7,21

Factors of 56

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

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

Factors of 6

List of positive integer factors of 6 that divides 6 without a remainder.

1,2,3,6

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Greatest Common Factor

We found the factors 64,21,56,6,15 . The biggest common factor number is the GCF number.
So the greatest common factor 64,21,56,6,15 is 1.

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

• GCF of 33, 93, 17, 2, 30
• GCF of 99, 47, 81, 8, 29
• GCF of 35, 53, 74, 6, 29
• GCF of 78, 66, 38, 3, 32
• GCF of 54, 67, 58, 7, 90

1. What is the GCF of 64, 21, 56, 6, 15?

Answer: GCF of 64, 21, 56, 6, 15 is 1.

2. How to Find the GCF of 64, 21, 56, 6, 15

Answer: Greatest Common Factor(GCF) of 64, 21, 56, 6, 15 = 1

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

Step 2: Then multiply all the prime factors GCF(64, 21, 56, 6, 15) = 1.