Greatest Common Factor of 21, 55, 76, 63

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

• Greatest Common Factor of 21, 55, 76, 63 by common division method
• Greatest Common Factor of 21, 55, 76, 63 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 55

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

1,5,11,55

Factors of 76

List of positive integer factors of 76 that divides 76 without a remainder.

1,2,4,19,38,76

Factors of 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Greatest Common Factor

We found the factors 21,55,76,63 . The biggest common factor number is the GCF number.
So the greatest common factor 21,55,76,63 is 1.

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

• GCF of 19, 16, 53, 20
• GCF of 28, 50, 38, 27
• GCF of 25, 34, 19, 20
• GCF of 45, 81, 64, 68
• GCF of 19, 73, 18, 70

1. What is the GCF of 21, 55, 76, 63?

Answer: GCF of 21, 55, 76, 63 is 1.

2. How to Find the GCF of 21, 55, 76, 63

Answer: Greatest Common Factor(GCF) of 21, 55, 76, 63 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 55, 76, 63) = 1.