Greatest Common Factor of 42, 66, 21, 609

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

• Greatest Common Factor of 42, 66, 21, 609 by common division method
• Greatest Common Factor of 42, 66, 21, 609 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 21

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

1,3,7,21

Factors of 609

List of positive integer factors of 609 that divides 609 without a remainder.

1,3,7,21,29,87,203,609

Greatest Common Factor

We found the factors 42,66,21,609 . The biggest common factor number is the GCF number.
So the greatest common factor 42,66,21,609 is 3.

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

• GCF of 70, 45, 23, 775
• GCF of 76, 35, 85, 182
• GCF of 86, 95, 41, 999
• GCF of 99, 89, 62, 341
• GCF of 62, 84, 38, 673

1. What is the GCF of 42, 66, 21, 609?

Answer: GCF of 42, 66, 21, 609 is 3.

2. How to Find the GCF of 42, 66, 21, 609

Answer: Greatest Common Factor(GCF) of 42, 66, 21, 609 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 66, 21, 609) = 3.