Greatest Common Factor of 21, 56, 455

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

• Greatest Common Factor of 21, 56, 455 by common division method
• Greatest Common Factor of 21, 56, 455 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 7 = 7

Factors of 21

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

1,3,7,21

Factors of 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Factors of 455

List of positive integer factors of 455 that divides 455 without a remainder.

1,5,7,13,35,65,91,455

Greatest Common Factor

We found the factors 21,56,455 . The biggest common factor number is the GCF number.
So the greatest common factor 21,56,455 is 7.

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

• GCF of 11, 63, 482
• GCF of 75, 56, 493
• GCF of 54, 36, 524
• GCF of 86, 66, 583
• GCF of 47, 71, 182

1. What is the GCF of 21, 56, 455?

Answer: GCF of 21, 56, 455 is 7.

2. How to Find the GCF of 21, 56, 455

Answer: Greatest Common Factor(GCF) of 21, 56, 455 = 7

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

Step 2: Then multiply all the prime factors GCF(21, 56, 455) = 7.