Greatest Common Factor of 81, 42, 405

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

• Greatest Common Factor of 81, 42, 405 by common division method
• Greatest Common Factor of 81, 42, 405 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

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 405

List of positive integer factors of 405 that divides 405 without a remainder.

1,3,5,9,15,27,45,81,135,405

Greatest Common Factor

We found the factors 81,42,405 . The biggest common factor number is the GCF number.
So the greatest common factor 81,42,405 is 3.

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

• GCF of 60, 45, 817
• GCF of 55, 39, 930
• GCF of 60, 33, 722
• GCF of 63, 78, 457
• GCF of 16, 34, 860

1. What is the GCF of 81, 42, 405?

Answer: GCF of 81, 42, 405 is 3.

2. How to Find the GCF of 81, 42, 405

Answer: Greatest Common Factor(GCF) of 81, 42, 405 = 3

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

Step 2: Then multiply all the prime factors GCF(81, 42, 405) = 3.