Greatest Common Factor of 71, 63, 49, 21

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

• Greatest Common Factor of 71, 63, 49, 21 by common division method
• Greatest Common Factor of 71, 63, 49, 21 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 71

List of positive integer factors of 71 that divides 71 without a remainder.

1,71

Factors of 63

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

1,3,7,9,21,63

Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1,7,49

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 71,63,49,21 . The biggest common factor number is the GCF number.
So the greatest common factor 71,63,49,21 is 1.

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

• GCF of 99, 57, 42, 40
• GCF of 46, 28, 52, 50
• GCF of 49, 14, 50, 82
• GCF of 90, 75, 94, 60
• GCF of 74, 33, 14, 94

1. What is the GCF of 71, 63, 49, 21?

Answer: GCF of 71, 63, 49, 21 is 1.

2. How to Find the GCF of 71, 63, 49, 21

Answer: Greatest Common Factor(GCF) of 71, 63, 49, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(71, 63, 49, 21) = 1.