Greatest Common Factor of 198, 158, 21

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

• Greatest Common Factor of 198, 158, 21 by common division method
• Greatest Common Factor of 198, 158, 21 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 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

Factors of 158

List of positive integer factors of 158 that divides 158 without a remainder.

1,2,79,158

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Greatest Common Factor

We found the factors 198,158,21 . The biggest common factor number is the GCF number.
So the greatest common factor 198,158,21 is 1.

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

• GCF of 539, 284, 64
• GCF of 127, 866, 64
• GCF of 453, 987, 90
• GCF of 210, 619, 24
• GCF of 141, 295, 26

1. What is the GCF of 198, 158, 21?

Answer: GCF of 198, 158, 21 is 1.

2. How to Find the GCF of 198, 158, 21

Answer: Greatest Common Factor(GCF) of 198, 158, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(198, 158, 21) = 1.