Greatest Common Factor of 81, 70, 391

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

• Greatest Common Factor of 81, 70, 391 by common division method
• Greatest Common Factor of 81, 70, 391 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 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 70

List of positive integer factors of 70 that divides 70 without a remainder.

1,2,5,7,10,14,35,70

Factors of 391

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

1,17,23,391

Greatest Common Factor

We found the factors 81,70,391 . The biggest common factor number is the GCF number.
So the greatest common factor 81,70,391 is 1.

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

• GCF of 42, 13, 472
• GCF of 67, 87, 367
• GCF of 80, 46, 995
• GCF of 51, 72, 356
• GCF of 70, 42, 929

1. What is the GCF of 81, 70, 391?

Answer: GCF of 81, 70, 391 is 1.

2. How to Find the GCF of 81, 70, 391

Answer: Greatest Common Factor(GCF) of 81, 70, 391 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 70, 391) = 1.