Greatest Common Factor of 21, 687, 660

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

• Greatest Common Factor of 21, 687, 660 by common division method
• Greatest Common Factor of 21, 687, 660 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 687

List of positive integer factors of 687 that divides 687 without a remainder.

1,3,229,687

Factors of 660

List of positive integer factors of 660 that divides 660 without a remainder.

1,2,3,4,5,6,10,11,12,15,20,22,30,33,44,55,60,66,110,132,165,220,330,660

Greatest Common Factor

We found the factors 21,687,660 . The biggest common factor number is the GCF number.
So the greatest common factor 21,687,660 is 3.

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

• GCF of 40, 285, 822
• GCF of 70, 391, 927
• GCF of 73, 929, 530
• GCF of 85, 291, 843
• GCF of 22, 422, 421

1. What is the GCF of 21, 687, 660?

Answer: GCF of 21, 687, 660 is 3.

2. How to Find the GCF of 21, 687, 660

Answer: Greatest Common Factor(GCF) of 21, 687, 660 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 687, 660) = 3.