Greatest Common Factor of 19, 20, 42, 870

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

• Greatest Common Factor of 19, 20, 42, 870 by common division method
• Greatest Common Factor of 19, 20, 42, 870 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 20

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

1,2,4,5,10,20

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 870

List of positive integer factors of 870 that divides 870 without a remainder.

1,2,3,5,6,10,15,29,30,58,87,145,174,290,435,870

Greatest Common Factor

We found the factors 19,20,42,870 . The biggest common factor number is the GCF number.
So the greatest common factor 19,20,42,870 is 1.

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

• GCF of 73, 37, 13, 122
• GCF of 94, 82, 96, 602
• GCF of 26, 44, 98, 257
• GCF of 57, 84, 17, 697
• GCF of 92, 50, 42, 289

1. What is the GCF of 19, 20, 42, 870?

Answer: GCF of 19, 20, 42, 870 is 1.

2. How to Find the GCF of 19, 20, 42, 870

Answer: Greatest Common Factor(GCF) of 19, 20, 42, 870 = 1

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

Step 2: Then multiply all the prime factors GCF(19, 20, 42, 870) = 1.