Greatest Common Factor of 28, 11, 398, 645

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

• Greatest Common Factor of 28, 11, 398, 645 by common division method
• Greatest Common Factor of 28, 11, 398, 645 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 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Factors of 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Factors of 398

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

1,2,199,398

Factors of 645

List of positive integer factors of 645 that divides 645 without a remainder.

1,3,5,15,43,129,215,645

Greatest Common Factor

We found the factors 28,11,398,645 . The biggest common factor number is the GCF number.
So the greatest common factor 28,11,398,645 is 1.

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

• GCF of 69, 49, 796, 240
• GCF of 67, 61, 883, 107
• GCF of 73, 23, 720, 675
• GCF of 80, 50, 288, 238
• GCF of 43, 39, 265, 134

1. What is the GCF of 28, 11, 398, 645?

Answer: GCF of 28, 11, 398, 645 is 1.

2. How to Find the GCF of 28, 11, 398, 645

Answer: Greatest Common Factor(GCF) of 28, 11, 398, 645 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 11, 398, 645) = 1.