Greatest Common Factor of 15, 20, 25, 891

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

• Greatest Common Factor of 15, 20, 25, 891 by common division method
• Greatest Common Factor of 15, 20, 25, 891 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 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 20

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

1,2,4,5,10,20

Factors of 25

List of positive integer factors of 25 that divides 25 without a remainder.

1,5,25

Factors of 891

List of positive integer factors of 891 that divides 891 without a remainder.

1,3,9,11,27,33,81,99,297,891

Greatest Common Factor

We found the factors 15,20,25,891 . The biggest common factor number is the GCF number.
So the greatest common factor 15,20,25,891 is 1.

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

• GCF of 91, 78, 52, 797
• GCF of 20, 53, 18, 407
• GCF of 58, 62, 58, 493
• GCF of 21, 10, 73, 482
• GCF of 74, 27, 62, 724

1. What is the GCF of 15, 20, 25, 891?

Answer: GCF of 15, 20, 25, 891 is 1.

2. How to Find the GCF of 15, 20, 25, 891

Answer: Greatest Common Factor(GCF) of 15, 20, 25, 891 = 1

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

Step 2: Then multiply all the prime factors GCF(15, 20, 25, 891) = 1.