Greatest Common Factor of 21, 19, 71

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

• Greatest Common Factor of 21, 19, 71 by common division method
• Greatest Common Factor of 21, 19, 71 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 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Factors of 71

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

1,71

Greatest Common Factor

We found the factors 21,19,71 . The biggest common factor number is the GCF number.
So the greatest common factor 21,19,71 is 1.

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

• GCF of 79, 82, 95
• GCF of 58, 93, 72
• GCF of 13, 42, 89
• GCF of 30, 20, 58
• GCF of 70, 34, 13

1. What is the GCF of 21, 19, 71?

Answer: GCF of 21, 19, 71 is 1.

2. How to Find the GCF of 21, 19, 71

Answer: Greatest Common Factor(GCF) of 21, 19, 71 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 19, 71) = 1.