Greatest Common Factor of 21, 77, 490

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

• Greatest Common Factor of 21, 77, 490 by common division method
• Greatest Common Factor of 21, 77, 490 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 7 = 7

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 490

List of positive integer factors of 490 that divides 490 without a remainder.

1,2,5,7,10,14,35,49,70,98,245,490

Greatest Common Factor

We found the factors 21,77,490 . The biggest common factor number is the GCF number.
So the greatest common factor 21,77,490 is 7.

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

• GCF of 60, 83, 926
• GCF of 30, 36, 492
• GCF of 11, 57, 123
• GCF of 28, 93, 960
• GCF of 12, 89, 615

1. What is the GCF of 21, 77, 490?

Answer: GCF of 21, 77, 490 is 7.

2. How to Find the GCF of 21, 77, 490

Answer: Greatest Common Factor(GCF) of 21, 77, 490 = 7

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

Step 2: Then multiply all the prime factors GCF(21, 77, 490) = 7.