Greatest Common Factor of 409, 639, 20

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

• Greatest Common Factor of 409, 639, 20 by common division method
• Greatest Common Factor of 409, 639, 20 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 409

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

1,409

Factors of 639

List of positive integer factors of 639 that divides 639 without a remainder.

1,3,9,71,213,639

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Greatest Common Factor

We found the factors 409,639,20 . The biggest common factor number is the GCF number.
So the greatest common factor 409,639,20 is 1.

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

• GCF of 659, 604, 96
• GCF of 568, 314, 43
• GCF of 968, 915, 54
• GCF of 437, 362, 97
• GCF of 733, 631, 46

1. What is the GCF of 409, 639, 20?

Answer: GCF of 409, 639, 20 is 1.

2. How to Find the GCF of 409, 639, 20

Answer: Greatest Common Factor(GCF) of 409, 639, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(409, 639, 20) = 1.