Greatest Common Factor of 189, 42

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

• Greatest Common Factor of 189, 42 by common division method
• Greatest Common Factor of 189, 42 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 x 7 = 21

Factors of 189

List of positive integer factors of 189 that divides 189 without a remainder.

1,3,7,9,21,27,63,189

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Greatest Common Factor

We found the factors 189,42 . The biggest common factor number is the GCF number.
So the greatest common factor 189,42 is 21.

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

• GCF of 468, 38
• GCF of 148, 35
• GCF of 967, 86
• GCF of 200, 45
• GCF of 770, 47

1. What is the GCF of 189, 42?

Answer: GCF of 189, 42 is 21.

2. How to Find the GCF of 189, 42

Answer: Greatest Common Factor(GCF) of 189, 42 = 21

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

Step 2: Then multiply all the prime factors GCF(189, 42) = 21.