Greatest Common Factor of 61, 68, 20, 123

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

• Greatest Common Factor of 61, 68, 20, 123 by common division method
• Greatest Common Factor of 61, 68, 20, 123 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 61

List of positive integer factors of 61 that divides 61 without a remainder.

1,61

Factors of 68

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

1,2,4,17,34,68

Factors of 20

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

1,2,4,5,10,20

Factors of 123

List of positive integer factors of 123 that divides 123 without a remainder.

1,3,41,123

Greatest Common Factor

We found the factors 61,68,20,123 . The biggest common factor number is the GCF number.
So the greatest common factor 61,68,20,123 is 1.

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

• GCF of 76, 97, 26, 731
• GCF of 65, 97, 19, 517
• GCF of 10, 97, 17, 903
• GCF of 39, 96, 78, 443
• GCF of 50, 69, 18, 577

1. What is the GCF of 61, 68, 20, 123?

Answer: GCF of 61, 68, 20, 123 is 1.

2. How to Find the GCF of 61, 68, 20, 123

Answer: Greatest Common Factor(GCF) of 61, 68, 20, 123 = 1

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

Step 2: Then multiply all the prime factors GCF(61, 68, 20, 123) = 1.