Greatest Common Factor of 19, 90, 42, 155

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

• Greatest Common Factor of 19, 90, 42, 155 by common division method
• Greatest Common Factor of 19, 90, 42, 155 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 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

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 155

List of positive integer factors of 155 that divides 155 without a remainder.

1,5,31,155

Greatest Common Factor

We found the factors 19,90,42,155 . The biggest common factor number is the GCF number.
So the greatest common factor 19,90,42,155 is 1.

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

• GCF of 49, 46, 63, 714
• GCF of 33, 29, 86, 624
• GCF of 56, 96, 75, 264
• GCF of 26, 89, 88, 451
• GCF of 53, 45, 17, 767

1. What is the GCF of 19, 90, 42, 155?

Answer: GCF of 19, 90, 42, 155 is 1.

2. How to Find the GCF of 19, 90, 42, 155

Answer: Greatest Common Factor(GCF) of 19, 90, 42, 155 = 1

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

Step 2: Then multiply all the prime factors GCF(19, 90, 42, 155) = 1.