Greatest Common Factor of 78, 39, 20, 100

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

• Greatest Common Factor of 78, 39, 20, 100 by common division method
• Greatest Common Factor of 78, 39, 20, 100 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 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 20

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

1,2,4,5,10,20

Factors of 100

List of positive integer factors of 100 that divides 100 without a remainder.

1,2,4,5,10,20,25,50,100

Greatest Common Factor

We found the factors 78,39,20,100 . The biggest common factor number is the GCF number.
So the greatest common factor 78,39,20,100 is 1.

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

• GCF of 30, 83, 27, 286
• GCF of 74, 17, 38, 461
• GCF of 63, 87, 29, 259
• GCF of 97, 22, 99, 823
• GCF of 92, 45, 40, 155

1. What is the GCF of 78, 39, 20, 100?

Answer: GCF of 78, 39, 20, 100 is 1.

2. How to Find the GCF of 78, 39, 20, 100

Answer: Greatest Common Factor(GCF) of 78, 39, 20, 100 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 39, 20, 100) = 1.