Greatest Common Factor of 21, 80, 409

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

• Greatest Common Factor of 21, 80, 409 by common division method
• Greatest Common Factor of 21, 80, 409 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 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 409

List of positive integer factors of 409 that divides 409 without a remainder.

1,409

Greatest Common Factor

We found the factors 21,80,409 . The biggest common factor number is the GCF number.
So the greatest common factor 21,80,409 is 1.

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

• GCF of 89, 22, 868
• GCF of 89, 68, 539
• GCF of 94, 26, 343
• GCF of 81, 93, 471
• GCF of 25, 75, 116

1. What is the GCF of 21, 80, 409?

Answer: GCF of 21, 80, 409 is 1.

2. How to Find the GCF of 21, 80, 409

Answer: Greatest Common Factor(GCF) of 21, 80, 409 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 80, 409) = 1.