Greatest Common Factor of 21, 81, 51, 227

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

• Greatest Common Factor of 21, 81, 51, 227 by common division method
• Greatest Common Factor of 21, 81, 51, 227 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

Factors of 227

List of positive integer factors of 227 that divides 227 without a remainder.

1,227

Greatest Common Factor

We found the factors 21,81,51,227 . The biggest common factor number is the GCF number.
So the greatest common factor 21,81,51,227 is 1.

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

• GCF of 64, 13, 87, 178
• GCF of 74, 41, 39, 133
• GCF of 38, 74, 20, 203
• GCF of 55, 38, 60, 348
• GCF of 21, 45, 63, 422

1. What is the GCF of 21, 81, 51, 227?

Answer: GCF of 21, 81, 51, 227 is 1.

2. How to Find the GCF of 21, 81, 51, 227

Answer: Greatest Common Factor(GCF) of 21, 81, 51, 227 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 81, 51, 227) = 1.