Greatest Common Factor of 640, 405, 820

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

• Greatest Common Factor of 640, 405, 820 by common division method
• Greatest Common Factor of 640, 405, 820 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 5 = 5

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

Factors of 820

List of positive integer factors of 820 that divides 820 without a remainder.

1,2,4,5,10,20,41,82,164,205,410,820

Greatest Common Factor

We found the factors 640,405,820 . The biggest common factor number is the GCF number.
So the greatest common factor 640,405,820 is 5.

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

• GCF of 681, 717, 940
• GCF of 184, 633, 652
• GCF of 393, 432, 201
• GCF of 611, 582, 229
• GCF of 806, 687, 507

1. What is the GCF of 640, 405, 820?

Answer: GCF of 640, 405, 820 is 5.

2. How to Find the GCF of 640, 405, 820

Answer: Greatest Common Factor(GCF) of 640, 405, 820 = 5

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

Step 2: Then multiply all the prime factors GCF(640, 405, 820) = 5.