Greatest Common Factor of 21, 87, 60, 243

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

• Greatest Common Factor of 21, 87, 60, 243 by common division method
• Greatest Common Factor of 21, 87, 60, 243 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 21

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

1,3,7,21

Factors of 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 60

List of positive integer factors of 60 that divides 60 without a remainder.

1,2,3,4,5,6,10,12,15,20,30,60

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 21,87,60,243 . The biggest common factor number is the GCF number.
So the greatest common factor 21,87,60,243 is 3.

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

• GCF of 92, 17, 53, 662
• GCF of 83, 25, 94, 676
• GCF of 50, 46, 99, 293
• GCF of 95, 77, 39, 705
• GCF of 51, 36, 16, 296

1. What is the GCF of 21, 87, 60, 243?

Answer: GCF of 21, 87, 60, 243 is 3.

2. How to Find the GCF of 21, 87, 60, 243

Answer: Greatest Common Factor(GCF) of 21, 87, 60, 243 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 87, 60, 243) = 3.