Greatest Common Factor of 21, 81, 76, 720

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

• Greatest Common Factor of 21, 81, 76, 720 by common division method
• Greatest Common Factor of 21, 81, 76, 720 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 76

List of positive integer factors of 76 that divides 76 without a remainder.

1,2,4,19,38,76

Factors of 720

List of positive integer factors of 720 that divides 720 without a remainder.

1,2,3,4,5,6,8,9,10,12,15,16,18,20,24,30,36,40,45,48,60,72,80,90,120,144,180,240,360,720

Greatest Common Factor

We found the factors 21,81,76,720 . The biggest common factor number is the GCF number.
So the greatest common factor 21,81,76,720 is 1.

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

• GCF of 27, 54, 50, 842
• GCF of 73, 71, 54, 231
• GCF of 85, 61, 89, 864
• GCF of 60, 66, 84, 478
• GCF of 78, 36, 90, 715

1. What is the GCF of 21, 81, 76, 720?

Answer: GCF of 21, 81, 76, 720 is 1.

2. How to Find the GCF of 21, 81, 76, 720

Answer: Greatest Common Factor(GCF) of 21, 81, 76, 720 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 81, 76, 720) = 1.