Greatest Common Factor of 20, 30, 69, 168

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

• Greatest Common Factor of 20, 30, 69, 168 by common division method
• Greatest Common Factor of 20, 30, 69, 168 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 20

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

1,2,4,5,10,20

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 69

List of positive integer factors of 69 that divides 69 without a remainder.

1,3,23,69

Factors of 168

List of positive integer factors of 168 that divides 168 without a remainder.

1,2,3,4,6,7,8,12,14,21,24,28,42,56,84,168

Greatest Common Factor

We found the factors 20,30,69,168 . The biggest common factor number is the GCF number.
So the greatest common factor 20,30,69,168 is 1.

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

• GCF of 30, 34, 13, 860
• GCF of 33, 68, 10, 634
• GCF of 92, 66, 39, 329
• GCF of 43, 43, 57, 353
• GCF of 26, 49, 43, 632

1. What is the GCF of 20, 30, 69, 168?

Answer: GCF of 20, 30, 69, 168 is 1.

2. How to Find the GCF of 20, 30, 69, 168

Answer: Greatest Common Factor(GCF) of 20, 30, 69, 168 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 30, 69, 168) = 1.