Greatest Common Factor of 18, 85, 31, 721

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

• Greatest Common Factor of 18, 85, 31, 721 by common division method
• Greatest Common Factor of 18, 85, 31, 721 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 18

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

1,2,3,6,9,18

Factors of 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

Factors of 721

List of positive integer factors of 721 that divides 721 without a remainder.

1,7,103,721

Greatest Common Factor

We found the factors 18,85,31,721 . The biggest common factor number is the GCF number.
So the greatest common factor 18,85,31,721 is 1.

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

• GCF of 71, 71, 78, 776
• GCF of 65, 39, 80, 468
• GCF of 34, 31, 28, 372
• GCF of 37, 31, 29, 218
• GCF of 19, 46, 84, 582

1. What is the GCF of 18, 85, 31, 721?

Answer: GCF of 18, 85, 31, 721 is 1.

2. How to Find the GCF of 18, 85, 31, 721

Answer: Greatest Common Factor(GCF) of 18, 85, 31, 721 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 85, 31, 721) = 1.