Greatest Common Factor of 28, 55, 69, 198

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

• Greatest Common Factor of 28, 55, 69, 198 by common division method
• Greatest Common Factor of 28, 55, 69, 198 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 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 55

List of positive integer factors of 55 that divides 55 without a remainder.

1,5,11,55

Factors of 69

List of positive integer factors of 69 that divides 69 without a remainder.

1,3,23,69

Factors of 198

List of positive integer factors of 198 that divides 198 without a remainder.

1,2,3,6,9,11,18,22,33,66,99,198

Greatest Common Factor

We found the factors 28,55,69,198 . The biggest common factor number is the GCF number.
So the greatest common factor 28,55,69,198 is 1.

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

• GCF of 19, 20, 96, 143
• GCF of 80, 69, 45, 345
• GCF of 80, 41, 61, 768
• GCF of 51, 17, 95, 274
• GCF of 30, 96, 71, 258

1. What is the GCF of 28, 55, 69, 198?

Answer: GCF of 28, 55, 69, 198 is 1.

2. How to Find the GCF of 28, 55, 69, 198

Answer: Greatest Common Factor(GCF) of 28, 55, 69, 198 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 55, 69, 198) = 1.