Greatest Common Factor of 21, 72, 38, 84

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

• Greatest Common Factor of 21, 72, 38, 84 by common division method
• Greatest Common Factor of 21, 72, 38, 84 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 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 38

List of positive integer factors of 38 that divides 38 without a remainder.

1,2,19,38

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

Greatest Common Factor

We found the factors 21,72,38,84 . The biggest common factor number is the GCF number.
So the greatest common factor 21,72,38,84 is 1.

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

• GCF of 42, 11, 49, 44
• GCF of 61, 83, 75, 79
• GCF of 47, 37, 71, 90
• GCF of 44, 73, 64, 82
• GCF of 57, 29, 98, 56

1. What is the GCF of 21, 72, 38, 84?

Answer: GCF of 21, 72, 38, 84 is 1.

2. How to Find the GCF of 21, 72, 38, 84

Answer: Greatest Common Factor(GCF) of 21, 72, 38, 84 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 72, 38, 84) = 1.