Greatest Common Factor of 42, 81, 987

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

• Greatest Common Factor of 42, 81, 987 by common division method
• Greatest Common Factor of 42, 81, 987 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 42

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

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

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 987

List of positive integer factors of 987 that divides 987 without a remainder.

1,3,7,21,47,141,329,987

Greatest Common Factor

We found the factors 42,81,987 . The biggest common factor number is the GCF number.
So the greatest common factor 42,81,987 is 3.

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

• GCF of 79, 26, 514
• GCF of 85, 36, 642
• GCF of 80, 30, 478
• GCF of 13, 14, 839
• GCF of 90, 72, 569

1. What is the GCF of 42, 81, 987?

Answer: GCF of 42, 81, 987 is 3.

2. How to Find the GCF of 42, 81, 987

Answer: Greatest Common Factor(GCF) of 42, 81, 987 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 81, 987) = 3.