Greatest Common Factor of 21, 17, 21, 447

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

• Greatest Common Factor of 21, 17, 21, 447 by common division method
• Greatest Common Factor of 21, 17, 21, 447 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 17

List of positive integer factors of 17 that divides 17 without a remainder.

1,17

Factors of 21

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

1,3,7,21

Factors of 447

List of positive integer factors of 447 that divides 447 without a remainder.

1,3,149,447

Greatest Common Factor

We found the factors 21,17,21,447 . The biggest common factor number is the GCF number.
So the greatest common factor 21,17,21,447 is 1.

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

• GCF of 94, 55, 40, 499
• GCF of 14, 16, 82, 732
• GCF of 27, 48, 75, 982
• GCF of 47, 94, 11, 504
• GCF of 73, 88, 81, 916

1. What is the GCF of 21, 17, 21, 447?

Answer: GCF of 21, 17, 21, 447 is 1.

2. How to Find the GCF of 21, 17, 21, 447

Answer: Greatest Common Factor(GCF) of 21, 17, 21, 447 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 17, 21, 447) = 1.