Q: What are the factor combinations of the number 140,728,765?

 A:
Positive:   1 x 1407287655 x 281457535171 x 272155443 x 25855
Negative: -1 x -140728765-5 x -28145753-5171 x -27215-5443 x -25855


How do I find the factor combinations of the number 140,728,765?

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 140,728,765, 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.

1 140,728,765
-1 -140,728,765

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 140,728,765.

Example:
1 x 140,728,765 = 140,728,765
and
-1 x -140,728,765 = 140,728,765
Notice both answers equal 140,728,765

With that explanation out of the way, let's continue. Next, we take the number 140,728,765 and divide it by 2:

140,728,765 ÷ 2 = 70,364,382.5

If the quotient is a whole number, then 2 and 70,364,382.5 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:

1 140,728,765
-1 -140,728,765

Now, we try dividing 140,728,765 by 3:

140,728,765 ÷ 3 = 46,909,588.3333

If the quotient is a whole number, then 3 and 46,909,588.3333 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:

1 140,728,765
-1 -140,728,765

Let's try dividing by 4:

140,728,765 ÷ 4 = 35,182,191.25

If the quotient is a whole number, then 4 and 35,182,191.25 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:

1 140,728,765
-1 140,728,765
Keep dividing by the next highest number until you cannot divide anymore.

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

155,1715,44325,85527,21528,145,753140,728,765
-1-5-5,171-5,443-25,855-27,215-28,145,753-140,728,765

More Examples

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