Greatest Common Factor of 21, 495, 420

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

• Greatest Common Factor of 21, 495, 420 by common division method
• Greatest Common Factor of 21, 495, 420 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 21

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

1,3,7,21

Factors of 495

List of positive integer factors of 495 that divides 495 without a remainder.

1,3,5,9,11,15,33,45,55,99,165,495

Factors of 420

List of positive integer factors of 420 that divides 420 without a remainder.

1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420

Greatest Common Factor

We found the factors 21,495,420 . The biggest common factor number is the GCF number.
So the greatest common factor 21,495,420 is 3.

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

• GCF of 72, 774, 804
• GCF of 54, 811, 322
• GCF of 64, 606, 428
• GCF of 48, 490, 985
• GCF of 30, 243, 937

1. What is the GCF of 21, 495, 420?

Answer: GCF of 21, 495, 420 is 3.

2. How to Find the GCF of 21, 495, 420

Answer: Greatest Common Factor(GCF) of 21, 495, 420 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 495, 420) = 3.