Greatest Common Factor of 42, 640, 405

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

• Greatest Common Factor of 42, 640, 405 by common division method
• Greatest Common Factor of 42, 640, 405 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ GCF of numbers is 1 because of no common factors present between them.

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 640

List of positive integer factors of 640 that divides 640 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,128,160,320,640

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 42,640,405 . The biggest common factor number is the GCF number.
So the greatest common factor 42,640,405 is 1.

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

• GCF of 16, 719, 922
• GCF of 31, 274, 684
• GCF of 20, 435, 516
• GCF of 37, 481, 879
• GCF of 31, 632, 761

1. What is the GCF of 42, 640, 405?

Answer: GCF of 42, 640, 405 is 1.

2. How to Find the GCF of 42, 640, 405

Answer: Greatest Common Factor(GCF) of 42, 640, 405 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 640, 405) = 1.