Greatest Common Factor of 21, 42, 451, 180

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

• Greatest Common Factor of 21, 42, 451, 180 by common division method
• Greatest Common Factor of 21, 42, 451, 180 with matching the biggest common factor

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

Factors of 21

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

1,3,7,21

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 451

List of positive integer factors of 451 that divides 451 without a remainder.

1,11,41,451

Factors of 180

List of positive integer factors of 180 that divides 180 without a remainder.

1,2,3,4,5,6,9,10,12,15,18,20,30,36,45,60,90,180

Greatest Common Factor

We found the factors 21,42,451,180 . The biggest common factor number is the GCF number.
So the greatest common factor 21,42,451,180 is 1.

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

• GCF of 15, 99, 887, 357
• GCF of 95, 23, 388, 581
• GCF of 97, 19, 921, 698
• GCF of 38, 14, 655, 439
• GCF of 76, 31, 771, 532

1. What is the GCF of 21, 42, 451, 180?

Answer: GCF of 21, 42, 451, 180 is 1.

2. How to Find the GCF of 21, 42, 451, 180

Answer: Greatest Common Factor(GCF) of 21, 42, 451, 180 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 42, 451, 180) = 1.