Greatest Common Factor of 391, 122, 20

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

• Greatest Common Factor of 391, 122, 20 by common division method
• Greatest Common Factor of 391, 122, 20 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 391

List of positive integer factors of 391 that divides 391 without a remainder.

1,17,23,391

Factors of 122

List of positive integer factors of 122 that divides 122 without a remainder.

1,2,61,122

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Greatest Common Factor

We found the factors 391,122,20 . The biggest common factor number is the GCF number.
So the greatest common factor 391,122,20 is 1.

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

• GCF of 391, 122, 26
• GCF of 108, 409, 93
• GCF of 571, 376, 77
• GCF of 241, 679, 34
• GCF of 766, 419, 28

1. What is the GCF of 391, 122, 20?

Answer: GCF of 391, 122, 20 is 1.

2. How to Find the GCF of 391, 122, 20

Answer: Greatest Common Factor(GCF) of 391, 122, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(391, 122, 20) = 1.