Greatest Common Factor of 72, 43, 21

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

• Greatest Common Factor of 72, 43, 21 by common division method
• Greatest Common Factor of 72, 43, 21 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 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 43

List of positive integer factors of 43 that divides 43 without a remainder.

1,43

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 72,43,21 . The biggest common factor number is the GCF number.
So the greatest common factor 72,43,21 is 1.

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

• GCF of 38, 96, 46
• GCF of 88, 36, 77
• GCF of 55, 53, 71
• GCF of 95, 62, 20
• GCF of 62, 80, 28

1. What is the GCF of 72, 43, 21?

Answer: GCF of 72, 43, 21 is 1.

2. How to Find the GCF of 72, 43, 21

Answer: Greatest Common Factor(GCF) of 72, 43, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(72, 43, 21) = 1.