Greatest Common Factor of 31, 21, 68, 170

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

• Greatest Common Factor of 31, 21, 68, 170 by common division method
• Greatest Common Factor of 31, 21, 68, 170 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 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 68

List of positive integer factors of 68 that divides 68 without a remainder.

1,2,4,17,34,68

Factors of 170

List of positive integer factors of 170 that divides 170 without a remainder.

1,2,5,10,17,34,85,170

Greatest Common Factor

We found the factors 31,21,68,170 . The biggest common factor number is the GCF number.
So the greatest common factor 31,21,68,170 is 1.

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

• GCF of 10, 72, 54, 316
• GCF of 54, 33, 70, 354
• GCF of 44, 58, 92, 397
• GCF of 21, 30, 23, 578
• GCF of 19, 64, 80, 962

1. What is the GCF of 31, 21, 68, 170?

Answer: GCF of 31, 21, 68, 170 is 1.

2. How to Find the GCF of 31, 21, 68, 170

Answer: Greatest Common Factor(GCF) of 31, 21, 68, 170 = 1

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

Step 2: Then multiply all the prime factors GCF(31, 21, 68, 170) = 1.