Greatest Common Factor of 21, 36, 56, 243

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

• Greatest Common Factor of 21, 36, 56, 243 by common division method
• Greatest Common Factor of 21, 36, 56, 243 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 36

List of positive integer factors of 36 that divides 36 without a remainder.

1,2,3,4,6,9,12,18,36

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 243

List of positive integer factors of 243 that divides 243 without a remainder.

1,3,9,27,81,243

Greatest Common Factor

We found the factors 21,36,56,243 . The biggest common factor number is the GCF number.
So the greatest common factor 21,36,56,243 is 1.

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

• GCF of 77, 31, 60, 821
• GCF of 37, 78, 85, 614
• GCF of 42, 12, 56, 943
• GCF of 41, 55, 71, 644
• GCF of 59, 93, 27, 478

1. What is the GCF of 21, 36, 56, 243?

Answer: GCF of 21, 36, 56, 243 is 1.

2. How to Find the GCF of 21, 36, 56, 243

Answer: Greatest Common Factor(GCF) of 21, 36, 56, 243 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 36, 56, 243) = 1.