Greatest Common Factor of 770, 980, 21

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

• Greatest Common Factor of 770, 980, 21 by common division method
• Greatest Common Factor of 770, 980, 21 with matching the biggest common factor

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

Factors of 770

List of positive integer factors of 770 that divides 770 without a remainder.

1,2,5,7,10,11,14,22,35,55,70,77,110,154,385,770

Factors of 980

List of positive integer factors of 980 that divides 980 without a remainder.

1,2,4,5,7,10,14,20,28,35,49,70,98,140,196,245,490,980

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Greatest Common Factor

We found the factors 770,980,21 . The biggest common factor number is the GCF number.
So the greatest common factor 770,980,21 is 7.

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

• GCF of 245, 773, 97
• GCF of 898, 586, 56
• GCF of 926, 140, 30
• GCF of 332, 701, 59
• GCF of 200, 885, 57

1. What is the GCF of 770, 980, 21?

Answer: GCF of 770, 980, 21 is 7.

2. How to Find the GCF of 770, 980, 21

Answer: Greatest Common Factor(GCF) of 770, 980, 21 = 7

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

Step 2: Then multiply all the prime factors GCF(770, 980, 21) = 7.