Greatest Common Factor of 21, 90, 28, 540

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

• Greatest Common Factor of 21, 90, 28, 540 by common division method
• Greatest Common Factor of 21, 90, 28, 540 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ 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 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 540

List of positive integer factors of 540 that divides 540 without a remainder.

1,2,3,4,5,6,9,10,12,15,18,20,27,30,36,45,54,60,90,108,135,180,270,540

Greatest Common Factor

We found the factors 21,90,28,540 . The biggest common factor number is the GCF number.
So the greatest common factor 21,90,28,540 is 1.

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

• GCF of 27, 29, 44, 211
• GCF of 30, 56, 94, 760
• GCF of 96, 69, 33, 547
• GCF of 65, 40, 90, 802
• GCF of 54, 69, 42, 683

1. What is the GCF of 21, 90, 28, 540?

Answer: GCF of 21, 90, 28, 540 is 1.

2. How to Find the GCF of 21, 90, 28, 540

Answer: Greatest Common Factor(GCF) of 21, 90, 28, 540 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 90, 28, 540) = 1.