Greatest Common Factor of 21, 84, 70, 54

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

• Greatest Common Factor of 21, 84, 70, 54 by common division method
• Greatest Common Factor of 21, 84, 70, 54 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 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

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

Factors of 54

List of positive integer factors of 54 that divides 54 without a remainder.

1,2,3,6,9,18,27,54

Greatest Common Factor

We found the factors 21,84,70,54 . The biggest common factor number is the GCF number.
So the greatest common factor 21,84,70,54 is 1.

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

• GCF of 86, 25, 36, 29
• GCF of 70, 86, 67, 53
• GCF of 75, 77, 95, 49
• GCF of 69, 91, 32, 99
• GCF of 69, 64, 49, 88

1. What is the GCF of 21, 84, 70, 54?

Answer: GCF of 21, 84, 70, 54 is 1.

2. How to Find the GCF of 21, 84, 70, 54

Answer: Greatest Common Factor(GCF) of 21, 84, 70, 54 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 84, 70, 54) = 1.