Greatest Common Factor of 28, 42, 636, 409

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

• Greatest Common Factor of 28, 42, 636, 409 by common division method
• Greatest Common Factor of 28, 42, 636, 409 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 636

List of positive integer factors of 636 that divides 636 without a remainder.

1,2,3,4,6,12,53,106,159,212,318,636

Factors of 409

List of positive integer factors of 409 that divides 409 without a remainder.

1,409

Greatest Common Factor

We found the factors 28,42,636,409 . The biggest common factor number is the GCF number.
So the greatest common factor 28,42,636,409 is 1.

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

• GCF of 71, 89, 533, 272
• GCF of 65, 36, 321, 899
• GCF of 89, 44, 629, 716
• GCF of 49, 65, 933, 386
• GCF of 49, 51, 344, 356

1. What is the GCF of 28, 42, 636, 409?

Answer: GCF of 28, 42, 636, 409 is 1.

2. How to Find the GCF of 28, 42, 636, 409

Answer: Greatest Common Factor(GCF) of 28, 42, 636, 409 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 42, 636, 409) = 1.