Greatest Common Factor of 20, 640, 646

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

• Greatest Common Factor of 20, 640, 646 by common division method
• Greatest Common Factor of 20, 640, 646 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 2 = 2

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

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 646

List of positive integer factors of 646 that divides 646 without a remainder.

1,2,17,19,34,38,323,646

Greatest Common Factor

We found the factors 20,640,646 . The biggest common factor number is the GCF number.
So the greatest common factor 20,640,646 is 2.

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

• GCF of 46, 967, 899
• GCF of 56, 250, 757
• GCF of 41, 123, 688
• GCF of 10, 352, 869
• GCF of 81, 660, 146

1. What is the GCF of 20, 640, 646?

Answer: GCF of 20, 640, 646 is 2.

2. How to Find the GCF of 20, 640, 646

Answer: Greatest Common Factor(GCF) of 20, 640, 646 = 2

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

Step 2: Then multiply all the prime factors GCF(20, 640, 646) = 2.