Greatest Common Factor of 20, 38, 65, 780

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

• Greatest Common Factor of 20, 38, 65, 780 by common division method
• Greatest Common Factor of 20, 38, 65, 780 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 38

List of positive integer factors of 38 that divides 38 without a remainder.

1,2,19,38

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 780

List of positive integer factors of 780 that divides 780 without a remainder.

1,2,3,4,5,6,10,12,13,15,20,26,30,39,52,60,65,78,130,156,195,260,390,780

Greatest Common Factor

We found the factors 20,38,65,780 . The biggest common factor number is the GCF number.
So the greatest common factor 20,38,65,780 is 1.

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

• GCF of 92, 57, 88, 751
• GCF of 91, 27, 85, 385
• GCF of 42, 72, 85, 165
• GCF of 56, 22, 64, 768
• GCF of 75, 48, 66, 457

1. What is the GCF of 20, 38, 65, 780?

Answer: GCF of 20, 38, 65, 780 is 1.

2. How to Find the GCF of 20, 38, 65, 780

Answer: Greatest Common Factor(GCF) of 20, 38, 65, 780 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 38, 65, 780) = 1.