Greatest Common Factor of 21, 423, 665

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

• Greatest Common Factor of 21, 423, 665 by common division method
• Greatest Common Factor of 21, 423, 665 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 21

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

1,3,7,21

Factors of 423

List of positive integer factors of 423 that divides 423 without a remainder.

1,3,9,47,141,423

Factors of 665

List of positive integer factors of 665 that divides 665 without a remainder.

1,5,7,19,35,95,133,665

Greatest Common Factor

We found the factors 21,423,665 . The biggest common factor number is the GCF number.
So the greatest common factor 21,423,665 is 1.

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

• GCF of 29, 893, 207
• GCF of 32, 104, 396
• GCF of 45, 420, 284
• GCF of 99, 937, 221
• GCF of 60, 470, 272

1. What is the GCF of 21, 423, 665?

Answer: GCF of 21, 423, 665 is 1.

2. How to Find the GCF of 21, 423, 665

Answer: Greatest Common Factor(GCF) of 21, 423, 665 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 423, 665) = 1.