Q: What are the factor combinations of the number 331,203,760?

 A:
Positive:   1 x 3312037602 x 1656018804 x 828009405 x 662407528 x 4140047010 x 3312037616 x 2070023520 x 1656018840 x 828009480 x 4140047
Negative: -1 x -331203760-2 x -165601880-4 x -82800940-5 x -66240752-8 x -41400470-10 x -33120376-16 x -20700235-20 x -16560188-40 x -8280094-80 x -4140047


How do I find the factor combinations of the number 331,203,760?

Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 331,203,760, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.

1 331,203,760
-1 -331,203,760

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 331,203,760.

Example:
1 x 331,203,760 = 331,203,760
and
-1 x -331,203,760 = 331,203,760
Notice both answers equal 331,203,760

With that explanation out of the way, let's continue. Next, we take the number 331,203,760 and divide it by 2:

331,203,760 ÷ 2 = 165,601,880

If the quotient is a whole number, then 2 and 165,601,880 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 165,601,880 331,203,760
-1 -2 -165,601,880 -331,203,760

Now, we try dividing 331,203,760 by 3:

331,203,760 ÷ 3 = 110,401,253.3333

If the quotient is a whole number, then 3 and 110,401,253.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 2 165,601,880 331,203,760
-1 -2 -165,601,880 -331,203,760

Let's try dividing by 4:

331,203,760 ÷ 4 = 82,800,940

If the quotient is a whole number, then 4 and 82,800,940 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 4 82,800,940 165,601,880 331,203,760
-1 -2 -4 -82,800,940 -165,601,880 331,203,760
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

1245810162040804,140,0478,280,09416,560,18820,700,23533,120,37641,400,47066,240,75282,800,940165,601,880331,203,760
-1-2-4-5-8-10-16-20-40-80-4,140,047-8,280,094-16,560,188-20,700,235-33,120,376-41,400,470-66,240,752-82,800,940-165,601,880-331,203,760

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