Greatest Common Factor of 42, 78, 21, 261

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

• Greatest Common Factor of 42, 78, 21, 261 by common division method
• Greatest Common Factor of 42, 78, 21, 261 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 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 21

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

1,3,7,21

Factors of 261

List of positive integer factors of 261 that divides 261 without a remainder.

1,3,9,29,87,261

Greatest Common Factor

We found the factors 42,78,21,261 . The biggest common factor number is the GCF number.
So the greatest common factor 42,78,21,261 is 3.

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

• GCF of 80, 31, 67, 962
• GCF of 35, 46, 47, 232
• GCF of 61, 22, 92, 531
• GCF of 61, 84, 59, 565
• GCF of 47, 90, 77, 906

1. What is the GCF of 42, 78, 21, 261?

Answer: GCF of 42, 78, 21, 261 is 3.

2. How to Find the GCF of 42, 78, 21, 261

Answer: Greatest Common Factor(GCF) of 42, 78, 21, 261 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 78, 21, 261) = 3.