GCF for 1 and 19

What is the Greatest Common Factor of 1 and 19?

Answer: GCF of 1 and 19 is 1

(One)

Finding GCF for 1 and 19 using all factors (divisors) listing

The first method to find GCF for numbers 1 and 19 is to list all factors for both numbers and pick the highest common one:

All factors of 1: 1

All factors of 19: 1, 19

So the Greatest Common Factor for 1 and 19 is 1

Finding GCF for 1 and 19 by Prime Factorization

GCF Table

Number 1Number 2GCF
1191
2191
3191
419
5191
6191
719
8191
9191
10191
11191
1219
1319
1419
15191
1619
1719
18191
191919
20191
21191
22191
23191
24191
25191
26191
27191
28191
29191
30191

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 1 and 19? (The answer is: 1). Select the first number (e.g. '1') and the second number (e.g. '19'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 1 and 19?

GCF of 1 and 19 is 1