GCF for 21 and 97

What is the Greatest Common Factor of 21 and 97?

Answer: GCF of 21 and 97 is 1

(One)

Finding GCF for 21 and 97 using all factors (divisors) listing

The first method to find GCF for numbers 21 and 97 is to list all factors for both numbers and pick the highest common one:

All factors of 21: 1, 3, 7, 21

All factors of 97: 1, 97

So the Greatest Common Factor for 21 and 97 is 1

Finding GCF for 21 and 97 by Prime Factorization

GCF Table

Number 1Number 2GCF
6971
7971
8971
9971
10971
11971
12971
13971
14971
15971
16971
17971
18971
19971
20971
21971
22971
23971
24971
25971
26971
27971
28971
29971
30971
31971
32971
33971
34971
35971

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 21 and 97? (The answer is: 1). Select the first number (e.g. '21') and the second number (e.g. '97'). 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 21 and 97?

GCF of 21 and 97 is 1