Greatest Common Factor of 989, 380, 21

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

• Greatest Common Factor of 989, 380, 21 by common division method
• Greatest Common Factor of 989, 380, 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 380

List of positive integer factors of 380 that divides 380 without a remainder.

1,2,4,5,10,19,20,38,76,95,190,380

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 989,380,21 . The biggest common factor number is the GCF number.
So the greatest common factor 989,380,21 is 1.

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

• GCF of 690, 209, 29
• GCF of 845, 429, 38
• GCF of 764, 828, 15
• GCF of 201, 278, 46
• GCF of 343, 365, 72

1. What is the GCF of 989, 380, 21?

Answer: GCF of 989, 380, 21 is 1.

2. How to Find the GCF of 989, 380, 21

Answer: Greatest Common Factor(GCF) of 989, 380, 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, 380, 21) = 1.