Greatest Common Factor of 21, 77, 203, 491

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

• Greatest Common Factor of 21, 77, 203, 491 by common division method
• Greatest Common Factor of 21, 77, 203, 491 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 77

List of positive integer factors of 77 that divides 77 without a remainder.

1,7,11,77

Factors of 203

List of positive integer factors of 203 that divides 203 without a remainder.

1,7,29,203

Factors of 491

List of positive integer factors of 491 that divides 491 without a remainder.

1,491

Greatest Common Factor

We found the factors 21,77,203,491 . The biggest common factor number is the GCF number.
So the greatest common factor 21,77,203,491 is 1.

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

• GCF of 80, 47, 975, 152
• GCF of 32, 38, 115, 452
• GCF of 87, 72, 357, 472
• GCF of 63, 66, 345, 146
• GCF of 11, 10, 342, 672

1. What is the GCF of 21, 77, 203, 491?

Answer: GCF of 21, 77, 203, 491 is 1.

2. How to Find the GCF of 21, 77, 203, 491

Answer: Greatest Common Factor(GCF) of 21, 77, 203, 491 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 77, 203, 491) = 1.