Greatest Common Factor of 61, 81, 18, 809

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

• Greatest Common Factor of 61, 81, 18, 809 by common division method
• Greatest Common Factor of 61, 81, 18, 809 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 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Factors of 81

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

1,3,9,27,81

Factors of 18

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

1,2,3,6,9,18

Factors of 809

List of positive integer factors of 809 that divides 809 without a remainder.

1,809

Greatest Common Factor

We found the factors 61,81,18,809 . The biggest common factor number is the GCF number.
So the greatest common factor 61,81,18,809 is 1.

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

• GCF of 97, 96, 54, 785
• GCF of 21, 74, 85, 436
• GCF of 70, 33, 13, 220
• GCF of 89, 85, 80, 886
• GCF of 85, 93, 71, 149

1. What is the GCF of 61, 81, 18, 809?

Answer: GCF of 61, 81, 18, 809 is 1.

2. How to Find the GCF of 61, 81, 18, 809

Answer: Greatest Common Factor(GCF) of 61, 81, 18, 809 = 1

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

Step 2: Then multiply all the prime factors GCF(61, 81, 18, 809) = 1.