Greatest Common Factor of 42, 51, 420

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

• Greatest Common Factor of 42, 51, 420 by common division method
• Greatest Common Factor of 42, 51, 420 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 3 = 3

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 51

List of positive integer factors of 51 that divides 51 without a remainder.

1,3,17,51

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 42,51,420 . The biggest common factor number is the GCF number.
So the greatest common factor 42,51,420 is 3.

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

• GCF of 19, 83, 633
• GCF of 60, 25, 785
• GCF of 82, 99, 462
• GCF of 37, 65, 123
• GCF of 84, 15, 195

1. What is the GCF of 42, 51, 420?

Answer: GCF of 42, 51, 420 is 3.

2. How to Find the GCF of 42, 51, 420

Answer: Greatest Common Factor(GCF) of 42, 51, 420 = 3

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

Step 2: Then multiply all the prime factors GCF(42, 51, 420) = 3.