Greatest Common Factor of 18, 80, 99, 390

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

• Greatest Common Factor of 18, 80, 99, 390 by common division method
• Greatest Common Factor of 18, 80, 99, 390 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 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

Factors of 390

List of positive integer factors of 390 that divides 390 without a remainder.

1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390

Greatest Common Factor

We found the factors 18,80,99,390 . The biggest common factor number is the GCF number.
So the greatest common factor 18,80,99,390 is 1.

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

• GCF of 98, 61, 32, 385
• GCF of 30, 96, 30, 960
• GCF of 29, 48, 99, 784
• GCF of 45, 89, 89, 320
• GCF of 46, 16, 39, 493

1. What is the GCF of 18, 80, 99, 390?

Answer: GCF of 18, 80, 99, 390 is 1.

2. How to Find the GCF of 18, 80, 99, 390

Answer: Greatest Common Factor(GCF) of 18, 80, 99, 390 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 80, 99, 390) = 1.