Greatest Common Factor of 82, 18, 55, 21

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

• Greatest Common Factor of 82, 18, 55, 21 by common division method
• Greatest Common Factor of 82, 18, 55, 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 82

List of positive integer factors of 82 that divides 82 without a remainder.

1,2,41,82

Factors of 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 55

List of positive integer factors of 55 that divides 55 without a remainder.

1,5,11,55

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 82,18,55,21 . The biggest common factor number is the GCF number.
So the greatest common factor 82,18,55,21 is 1.

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

• GCF of 47, 61, 51, 57
• GCF of 87, 12, 83, 20
• GCF of 82, 27, 76, 35
• GCF of 60, 35, 43, 84
• GCF of 92, 94, 13, 46

1. What is the GCF of 82, 18, 55, 21?

Answer: GCF of 82, 18, 55, 21 is 1.

2. How to Find the GCF of 82, 18, 55, 21

Answer: Greatest Common Factor(GCF) of 82, 18, 55, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(82, 18, 55, 21) = 1.