Greatest Common Factor of 307, 255, 21

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

• Greatest Common Factor of 307, 255, 21 by common division method
• Greatest Common Factor of 307, 255, 21 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 307

List of positive integer factors of 307 that divides 307 without a remainder.

1,307

Factors of 255

List of positive integer factors of 255 that divides 255 without a remainder.

1,3,5,15,17,51,85,255

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Greatest Common Factor

We found the factors 307,255,21 . The biggest common factor number is the GCF number.
So the greatest common factor 307,255,21 is 1.

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

• GCF of 690, 834, 25
• GCF of 332, 618, 67
• GCF of 986, 186, 42
• GCF of 622, 535, 72
• GCF of 278, 641, 58

1. What is the GCF of 307, 255, 21?

Answer: GCF of 307, 255, 21 is 1.

2. How to Find the GCF of 307, 255, 21

Answer: Greatest Common Factor(GCF) of 307, 255, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(307, 255, 21) = 1.