Greatest Common Factor of 21, 64, 23, 398

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

• Greatest Common Factor of 21, 64, 23, 398 by common division method
• Greatest Common Factor of 21, 64, 23, 398 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 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Factors of 23

List of positive integer factors of 23 that divides 23 without a remainder.

1,23

Factors of 398

List of positive integer factors of 398 that divides 398 without a remainder.

1,2,199,398

Greatest Common Factor

We found the factors 21,64,23,398 . The biggest common factor number is the GCF number.
So the greatest common factor 21,64,23,398 is 1.

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

• GCF of 45, 22, 33, 620
• GCF of 56, 38, 49, 405
• GCF of 40, 92, 40, 627
• GCF of 62, 79, 10, 781
• GCF of 34, 92, 61, 320

1. What is the GCF of 21, 64, 23, 398?

Answer: GCF of 21, 64, 23, 398 is 1.

2. How to Find the GCF of 21, 64, 23, 398

Answer: Greatest Common Factor(GCF) of 21, 64, 23, 398 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 64, 23, 398) = 1.