Greatest Common Factor of 78, 18, 20, 625

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

• Greatest Common Factor of 78, 18, 20, 625 by common division method
• Greatest Common Factor of 78, 18, 20, 625 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 18

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

1,2,3,6,9,18

Factors of 20

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

1,2,4,5,10,20

Factors of 625

List of positive integer factors of 625 that divides 625 without a remainder.

1,5,25,125,625

Greatest Common Factor

We found the factors 78,18,20,625 . The biggest common factor number is the GCF number.
So the greatest common factor 78,18,20,625 is 1.

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

• GCF of 81, 86, 25, 591
• GCF of 57, 71, 25, 522
• GCF of 32, 84, 86, 492
• GCF of 58, 10, 25, 970
• GCF of 50, 38, 43, 190

1. What is the GCF of 78, 18, 20, 625?

Answer: GCF of 78, 18, 20, 625 is 1.

2. How to Find the GCF of 78, 18, 20, 625

Answer: Greatest Common Factor(GCF) of 78, 18, 20, 625 = 1

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

Step 2: Then multiply all the prime factors GCF(78, 18, 20, 625) = 1.