Greatest Common Factor of 27, 25, 20, 420

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

• Greatest Common Factor of 27, 25, 20, 420 by common division method
• Greatest Common Factor of 27, 25, 20, 420 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 27

List of positive integer factors of 27 that divides 27 without a remainder.

1,3,9,27

Factors of 25

List of positive integer factors of 25 that divides 25 without a remainder.

1,5,25

Factors of 20

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

1,2,4,5,10,20

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 27,25,20,420 . The biggest common factor number is the GCF number.
So the greatest common factor 27,25,20,420 is 1.

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

• GCF of 15, 68, 57, 952
• GCF of 59, 50, 36, 481
• GCF of 42, 90, 15, 856
• GCF of 70, 36, 91, 125
• GCF of 52, 81, 80, 562

1. What is the GCF of 27, 25, 20, 420?

Answer: GCF of 27, 25, 20, 420 is 1.

2. How to Find the GCF of 27, 25, 20, 420

Answer: Greatest Common Factor(GCF) of 27, 25, 20, 420 = 1

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

Step 2: Then multiply all the prime factors GCF(27, 25, 20, 420) = 1.