Greatest Common Factor of 81, 60, 21, 45, 987

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

• Greatest Common Factor of 81, 60, 21, 45, 987 by common division method
• Greatest Common Factor of 81, 60, 21, 45, 987 with matching the biggest common factor

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

Factors of 81

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

1,3,9,27,81

Factors of 60

List of positive integer factors of 60 that divides 60 without a remainder.

1,2,3,4,5,6,10,12,15,20,30,60

Factors of 21

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

1,3,7,21

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

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 81,60,21,45,987 . The biggest common factor number is the GCF number.
So the greatest common factor 81,60,21,45,987 is 3.

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

• GCF of 34, 91, 95, 87, 177
• GCF of 12, 87, 69, 88, 461
• GCF of 86, 47, 57, 93, 368
• GCF of 27, 99, 37, 69, 904
• GCF of 19, 38, 99, 54, 195

1. What is the GCF of 81, 60, 21, 45, 987?

Answer: GCF of 81, 60, 21, 45, 987 is 3.

2. How to Find the GCF of 81, 60, 21, 45, 987

Answer: Greatest Common Factor(GCF) of 81, 60, 21, 45, 987 = 3

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

Step 2: Then multiply all the prime factors GCF(81, 60, 21, 45, 987) = 3.