Greatest Common Factor of 87, 21, 18

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

• Greatest Common Factor of 87, 21, 18 by common division method
• Greatest Common Factor of 87, 21, 18 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 87

List of positive integer factors of 87 that divides 87 without a remainder.

1,3,29,87

Factors of 21

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

1,3,7,21

Factors of 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Greatest Common Factor

We found the factors 87,21,18 . The biggest common factor number is the GCF number.
So the greatest common factor 87,21,18 is 3.

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

• GCF of 68, 15, 45
• GCF of 25, 65, 19
• GCF of 72, 74, 30
• GCF of 16, 60, 20
• GCF of 38, 29, 31

1. What is the GCF of 87, 21, 18?

Answer: GCF of 87, 21, 18 is 3.

2. How to Find the GCF of 87, 21, 18

Answer: Greatest Common Factor(GCF) of 87, 21, 18 = 3

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

Step 2: Then multiply all the prime factors GCF(87, 21, 18) = 3.