Greatest Common Factor of 7, 18, 81, 13

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

• Greatest Common Factor of 7, 18, 81, 13 by common division method
• Greatest Common Factor of 7, 18, 81, 13 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 7

List of positive integer factors of 7 that divides 7 without a remainder.

1,7

Factors of 18

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

1,2,3,6,9,18

Factors of 81

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

1,3,9,27,81

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Greatest Common Factor

We found the factors 7,18,81,13 . The biggest common factor number is the GCF number.
So the greatest common factor 7,18,81,13 is 1.

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

• GCF of 6, 79, 41, 93
• GCF of 9, 91, 45, 63
• GCF of 9, 23, 83, 65
• GCF of 2, 76, 12, 51
• GCF of 7, 58, 32, 62

1. What is the GCF of 7, 18, 81, 13?

Answer: GCF of 7, 18, 81, 13 is 1.

2. How to Find the GCF of 7, 18, 81, 13

Answer: Greatest Common Factor(GCF) of 7, 18, 81, 13 = 1

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

Step 2: Then multiply all the prime factors GCF(7, 18, 81, 13) = 1.