Greatest Common Factor of 20, 40, 29, 21

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

• Greatest Common Factor of 20, 40, 29, 21 by common division method
• Greatest Common Factor of 20, 40, 29, 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 20

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

1,2,4,5,10,20

Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

1,2,4,5,8,10,20,40

Factors of 29

List of positive integer factors of 29 that divides 29 without a remainder.

1,29

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 20,40,29,21 . The biggest common factor number is the GCF number.
So the greatest common factor 20,40,29,21 is 1.

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

• GCF of 21, 57, 69, 21
• GCF of 12, 66, 37, 48
• GCF of 79, 88, 69, 79
• GCF of 30, 17, 49, 16
• GCF of 45, 77, 21, 23

1. What is the GCF of 20, 40, 29, 21?

Answer: GCF of 20, 40, 29, 21 is 1.

2. How to Find the GCF of 20, 40, 29, 21

Answer: Greatest Common Factor(GCF) of 20, 40, 29, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 40, 29, 21) = 1.