Greatest Common Factor of 18, 68, 43, 20, 80

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

• Greatest Common Factor of 18, 68, 43, 20, 80 by common division method
• Greatest Common Factor of 18, 68, 43, 20, 80 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 43

List of positive integer factors of 43 that divides 43 without a remainder.

1,43

Factors of 20

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

1,2,4,5,10,20

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Greatest Common Factor

We found the factors 18,68,43,20,80 . The biggest common factor number is the GCF number.
So the greatest common factor 18,68,43,20,80 is 1.

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

• GCF of 43, 55, 41, 59, 12
• GCF of 49, 72, 57, 70, 62
• GCF of 63, 18, 40, 49, 77
• GCF of 78, 24, 59, 45, 70
• GCF of 83, 82, 41, 85, 37

1. What is the GCF of 18, 68, 43, 20, 80?

Answer: GCF of 18, 68, 43, 20, 80 is 1.

2. How to Find the GCF of 18, 68, 43, 20, 80

Answer: Greatest Common Factor(GCF) of 18, 68, 43, 20, 80 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 68, 43, 20, 80) = 1.