Greatest Common Factor of 989, 770, 21

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

• Greatest Common Factor of 989, 770, 21 by common division method
• Greatest Common Factor of 989, 770, 21 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 989

List of positive integer factors of 989 that divides 989 without a remainder.

1,23,43,989

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 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 989,770,21 . The biggest common factor number is the GCF number.
So the greatest common factor 989,770,21 is 1.

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

• GCF of 205, 311, 59
• GCF of 921, 356, 32
• GCF of 777, 563, 38
• GCF of 660, 318, 84
• GCF of 722, 819, 53

1. What is the GCF of 989, 770, 21?

Answer: GCF of 989, 770, 21 is 1.

2. How to Find the GCF of 989, 770, 21

Answer: Greatest Common Factor(GCF) of 989, 770, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(989, 770, 21) = 1.