Greatest Common Factor of 20, 21, 11, 69

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

• Greatest Common Factor of 20, 21, 11, 69 by common division method
• Greatest Common Factor of 20, 21, 11, 69 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 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 21

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

1,3,7,21

Factors of 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Factors of 69

List of positive integer factors of 69 that divides 69 without a remainder.

1,3,23,69

Greatest Common Factor

We found the factors 20,21,11,69 . The biggest common factor number is the GCF number.
So the greatest common factor 20,21,11,69 is 1.

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

• GCF of 95, 28, 37, 92
• GCF of 97, 48, 94, 63
• GCF of 47, 68, 32, 84
• GCF of 49, 41, 88, 24
• GCF of 25, 71, 14, 54

1. What is the GCF of 20, 21, 11, 69?

Answer: GCF of 20, 21, 11, 69 is 1.

2. How to Find the GCF of 20, 21, 11, 69

Answer: Greatest Common Factor(GCF) of 20, 21, 11, 69 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 21, 11, 69) = 1.