Greatest Common Factor of 21, 12, 84, 654

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

• Greatest Common Factor of 21, 12, 84, 654 by common division method
• Greatest Common Factor of 21, 12, 84, 654 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 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 84

List of positive integer factors of 84 that divides 84 without a remainder.

1,2,3,4,6,7,12,14,21,28,42,84

Factors of 654

List of positive integer factors of 654 that divides 654 without a remainder.

1,2,3,6,109,218,327,654

Greatest Common Factor

We found the factors 21,12,84,654 . The biggest common factor number is the GCF number.
So the greatest common factor 21,12,84,654 is 3.

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

• GCF of 10, 88, 61, 225
• GCF of 77, 25, 60, 595
• GCF of 15, 78, 35, 737
• GCF of 42, 13, 59, 956
• GCF of 51, 66, 13, 479

1. What is the GCF of 21, 12, 84, 654?

Answer: GCF of 21, 12, 84, 654 is 3.

2. How to Find the GCF of 21, 12, 84, 654

Answer: Greatest Common Factor(GCF) of 21, 12, 84, 654 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 12, 84, 654) = 3.