Q: What are the factor combinations of the number 72,723,553?

 A:
Positive:   1 x 727235537 x 103890791163 x 625318141 x 8933
Negative: -1 x -72723553-7 x -10389079-1163 x -62531-8141 x -8933


How do I find the factor combinations of the number 72,723,553?

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 72,723,553, 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 72,723,553
-1 -72,723,553

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 72,723,553.

Example:
1 x 72,723,553 = 72,723,553
and
-1 x -72,723,553 = 72,723,553
Notice both answers equal 72,723,553

With that explanation out of the way, let's continue. Next, we take the number 72,723,553 and divide it by 2:

72,723,553 ÷ 2 = 36,361,776.5

If the quotient is a whole number, then 2 and 36,361,776.5 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 72,723,553
-1 -72,723,553

Now, we try dividing 72,723,553 by 3:

72,723,553 ÷ 3 = 24,241,184.3333

If the quotient is a whole number, then 3 and 24,241,184.3333 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 72,723,553
-1 -72,723,553

Let's try dividing by 4:

72,723,553 ÷ 4 = 18,180,888.25

If the quotient is a whole number, then 4 and 18,180,888.25 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 72,723,553
-1 72,723,553
Keep dividing by the next highest number until you cannot divide anymore.

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

171,1638,1418,93362,53110,389,07972,723,553
-1-7-1,163-8,141-8,933-62,531-10,389,079-72,723,553

More Examples

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