Greatest Common Factor of 13, 90, 420

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

• Greatest Common Factor of 13, 90, 420 by common division method
• Greatest Common Factor of 13, 90, 420 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 13

List of positive integer factors of 13 that divides 13 without a remainder.

1,13

Factors of 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 420

List of positive integer factors of 420 that divides 420 without a remainder.

1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420

Greatest Common Factor

We found the factors 13,90,420 . The biggest common factor number is the GCF number.
So the greatest common factor 13,90,420 is 1.

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

• GCF of 68, 25, 976
• GCF of 41, 49, 578
• GCF of 23, 93, 538
• GCF of 64, 96, 422
• GCF of 44, 89, 440

1. What is the GCF of 13, 90, 420?

Answer: GCF of 13, 90, 420 is 1.

2. How to Find the GCF of 13, 90, 420

Answer: Greatest Common Factor(GCF) of 13, 90, 420 = 1

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

Step 2: Then multiply all the prime factors GCF(13, 90, 420) = 1.