Greatest Common Factor of 18, 21, 142

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

• Greatest Common Factor of 18, 21, 142 by common division method
• Greatest Common Factor of 18, 21, 142 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 21

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

1,3,7,21

Factors of 142

List of positive integer factors of 142 that divides 142 without a remainder.

1,2,71,142

Greatest Common Factor

We found the factors 18,21,142 . The biggest common factor number is the GCF number.
So the greatest common factor 18,21,142 is 1.

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

• GCF of 77, 19, 698
• GCF of 54, 74, 657
• GCF of 26, 80, 243
• GCF of 96, 96, 528
• GCF of 86, 61, 986

1. What is the GCF of 18, 21, 142?

Answer: GCF of 18, 21, 142 is 1.

2. How to Find the GCF of 18, 21, 142

Answer: Greatest Common Factor(GCF) of 18, 21, 142 = 1

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

Step 2: Then multiply all the prime factors GCF(18, 21, 142) = 1.