Greatest Common Factor of 81, 40, 309

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

• Greatest Common Factor of 81, 40, 309 by common division method
• Greatest Common Factor of 81, 40, 309 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

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 309

List of positive integer factors of 309 that divides 309 without a remainder.

1,3,103,309

Greatest Common Factor

We found the factors 81,40,309 . The biggest common factor number is the GCF number.
So the greatest common factor 81,40,309 is 1.

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

• GCF of 63, 65, 930
• GCF of 38, 78, 960
• GCF of 58, 55, 500
• GCF of 13, 57, 475
• GCF of 88, 90, 140

1. What is the GCF of 81, 40, 309?

Answer: GCF of 81, 40, 309 is 1.

2. How to Find the GCF of 81, 40, 309

Answer: Greatest Common Factor(GCF) of 81, 40, 309 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 40, 309) = 1.