Greatest Common Factor of 21, 52, 60, 405

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

• Greatest Common Factor of 21, 52, 60, 405 by common division method
• Greatest Common Factor of 21, 52, 60, 405 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 52

List of positive integer factors of 52 that divides 52 without a remainder.

1,2,4,13,26,52

Factors of 60

List of positive integer factors of 60 that divides 60 without a remainder.

1,2,3,4,5,6,10,12,15,20,30,60

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

Greatest Common Factor

We found the factors 21,52,60,405 . The biggest common factor number is the GCF number.
So the greatest common factor 21,52,60,405 is 1.

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

• GCF of 55, 36, 25, 975
• GCF of 15, 96, 42, 756
• GCF of 88, 18, 83, 572
• GCF of 85, 54, 41, 266
• GCF of 14, 48, 68, 441

1. What is the GCF of 21, 52, 60, 405?

Answer: GCF of 21, 52, 60, 405 is 1.

2. How to Find the GCF of 21, 52, 60, 405

Answer: Greatest Common Factor(GCF) of 21, 52, 60, 405 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 52, 60, 405) = 1.