Q: What are the factor combinations of the number 243,441,777?

 A:
Positive:   1 x 2434417773 x 811472596379 x 3816312721 x 19137
Negative: -1 x -243441777-3 x -81147259-6379 x -38163-12721 x -19137


How do I find the factor combinations of the number 243,441,777?

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 243,441,777, 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.

1 243,441,777
-1 -243,441,777

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 243,441,777.

Example:
1 x 243,441,777 = 243,441,777
and
-1 x -243,441,777 = 243,441,777
Notice both answers equal 243,441,777

With that explanation out of the way, let's continue. Next, we take the number 243,441,777 and divide it by 2:

243,441,777 ÷ 2 = 121,720,888.5

If the quotient is a whole number, then 2 and 121,720,888.5 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:

1 243,441,777
-1 -243,441,777

Now, we try dividing 243,441,777 by 3:

243,441,777 ÷ 3 = 81,147,259

If the quotient is a whole number, then 3 and 81,147,259 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 3 81,147,259 243,441,777
-1 -3 -81,147,259 -243,441,777

Let's try dividing by 4:

243,441,777 ÷ 4 = 60,860,444.25

If the quotient is a whole number, then 4 and 60,860,444.25 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 3 81,147,259 243,441,777
-1 -3 -81,147,259 243,441,777
Keep dividing by the next highest number until you cannot divide anymore.

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

136,37912,72119,13738,16381,147,259243,441,777
-1-3-6,379-12,721-19,137-38,163-81,147,259-243,441,777

More Examples

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