Greatest Common Factor of 90, 42, 20, 390

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

• Greatest Common Factor of 90, 42, 20, 390 by common division method
• Greatest Common Factor of 90, 42, 20, 390 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 2 = 2

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 42

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

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

Factors of 20

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

1,2,4,5,10,20

Factors of 390

List of positive integer factors of 390 that divides 390 without a remainder.

1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390

Greatest Common Factor

We found the factors 90,42,20,390 . The biggest common factor number is the GCF number.
So the greatest common factor 90,42,20,390 is 2.

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

• GCF of 26, 55, 23, 485
• GCF of 68, 37, 44, 151
• GCF of 83, 81, 51, 847
• GCF of 21, 82, 74, 659
• GCF of 89, 66, 64, 547

1. What is the GCF of 90, 42, 20, 390?

Answer: GCF of 90, 42, 20, 390 is 2.

2. How to Find the GCF of 90, 42, 20, 390

Answer: Greatest Common Factor(GCF) of 90, 42, 20, 390 = 2

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

Step 2: Then multiply all the prime factors GCF(90, 42, 20, 390) = 2.