Greatest Common Factor of 6, 81, 57, 45

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

• Greatest Common Factor of 6, 81, 57, 45 by common division method
• Greatest Common Factor of 6, 81, 57, 45 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 6

List of positive integer factors of 6 that divides 6 without a remainder.

1,2,3,6

Factors of 81

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

1,3,9,27,81

Factors of 57

List of positive integer factors of 57 that divides 57 without a remainder.

1,3,19,57

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Greatest Common Factor

We found the factors 6,81,57,45 . The biggest common factor number is the GCF number.
So the greatest common factor 6,81,57,45 is 3.

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

• GCF of 2, 22, 87, 80
• GCF of 8, 90, 97, 65
• GCF of 3, 17, 16, 11
• GCF of 8, 67, 78, 73
• GCF of 7, 85, 96, 69

1. What is the GCF of 6, 81, 57, 45?

Answer: GCF of 6, 81, 57, 45 is 3.

2. How to Find the GCF of 6, 81, 57, 45

Answer: Greatest Common Factor(GCF) of 6, 81, 57, 45 = 3

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

Step 2: Then multiply all the prime factors GCF(6, 81, 57, 45) = 3.