Greatest Common Factor of 196, 390, 21

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

• Greatest Common Factor of 196, 390, 21 by common division method
• Greatest Common Factor of 196, 390, 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 196

List of positive integer factors of 196 that divides 196 without a remainder.

1,2,4,7,14,28,49,98,196

Factors of 390

List of positive integer factors of 390 that divides 390 without a remainder.

1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390

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 196,390,21 . The biggest common factor number is the GCF number.
So the greatest common factor 196,390,21 is 1.

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

• GCF of 823, 888, 82
• GCF of 248, 186, 41
• GCF of 862, 340, 65
• GCF of 707, 586, 78
• GCF of 493, 317, 40

1. What is the GCF of 196, 390, 21?

Answer: GCF of 196, 390, 21 is 1.

2. How to Find the GCF of 196, 390, 21

Answer: Greatest Common Factor(GCF) of 196, 390, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(196, 390, 21) = 1.