What two numbers have a GCF of 391?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 391.

There is actually an infinite number of answers to this question. First, note that both the numbers we are looking for must be multiples of 391. Below is the beginning list of multiples of 391 (1 through 7) in numerical order.

1. 391
2. 782
3. 1173
4. 1564
5. 1955
6. 2346
7. 2737
etc...

Two numbers that have a GCF of 391 can be 391 and any other number on the list above. Thus, two numbers that have a GCF of 391 are:

391 & 782
391 & 1173
391 & 1564
etc...

That is not all! Any combination of any multiple of 391 and "odd" multiples of 391 will also have GCF of 391. We numbered the multiples above so it would be easy to identify the "odd" multiples (number 1, 3, 5, 7, etc). Thus, here are some more examples of two numbers that also have a GCF of 391.

782 & 1173
782 & 1955
1564 & 1955
1564 & 2737
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 391. The lists we created can go on forever.

Two numbers have a GCF of Calculator
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Teacher Tip: If you are a teacher, you could ask these questions of your students: "I am thinking of two numbers and the GCF is 391, what are the numbers?" or "What are two numbers whose GCF is 391?"

What two numbers have a GCF of 392?
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