Greatest Common Factor of 21, 81, 987

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

• Greatest Common Factor of 21, 81, 987 by common division method
• Greatest Common Factor of 21, 81, 987 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

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

Factors of 21

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

1,3,7,21

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 21,81,987 . The biggest common factor number is the GCF number.
So the greatest common factor 21,81,987 is 3.

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

• GCF of 52, 80, 245
• GCF of 75, 63, 700
• GCF of 63, 37, 203
• GCF of 88, 97, 481
• GCF of 97, 11, 655

1. What is the GCF of 21, 81, 987?

Answer: GCF of 21, 81, 987 is 3.

2. How to Find the GCF of 21, 81, 987

Answer: Greatest Common Factor(GCF) of 21, 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(21, 81, 987) = 3.