Greatest Common Factor of 81, 73, 61, 18

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

• Greatest Common Factor of 81, 73, 61, 18 by common division method
• Greatest Common Factor of 81, 73, 61, 18 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 73

List of positive integer factors of 73 that divides 73 without a remainder.

1,73

Factors of 61

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

1,61

Factors of 18

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

1,2,3,6,9,18

Greatest Common Factor

We found the factors 81,73,61,18 . The biggest common factor number is the GCF number.
So the greatest common factor 81,73,61,18 is 1.

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

• GCF of 24, 65, 45, 26
• GCF of 26, 77, 28, 23
• GCF of 97, 46, 96, 29
• GCF of 92, 76, 85, 74
• GCF of 69, 36, 71, 43

1. What is the GCF of 81, 73, 61, 18?

Answer: GCF of 81, 73, 61, 18 is 1.

2. How to Find the GCF of 81, 73, 61, 18

Answer: Greatest Common Factor(GCF) of 81, 73, 61, 18 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 73, 61, 18) = 1.