Q: What are the factor combinations of the number 165,540,415?

 A:
Positive:   1 x 1655404155 x 331080833761 x 440158803 x 18805
Negative: -1 x -165540415-5 x -33108083-3761 x -44015-8803 x -18805


How do I find the factor combinations of the number 165,540,415?

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 165,540,415, 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.

1 165,540,415
-1 -165,540,415

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 165,540,415.

Example:
1 x 165,540,415 = 165,540,415
and
-1 x -165,540,415 = 165,540,415
Notice both answers equal 165,540,415

With that explanation out of the way, let's continue. Next, we take the number 165,540,415 and divide it by 2:

165,540,415 ÷ 2 = 82,770,207.5

If the quotient is a whole number, then 2 and 82,770,207.5 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:

1 165,540,415
-1 -165,540,415

Now, we try dividing 165,540,415 by 3:

165,540,415 ÷ 3 = 55,180,138.3333

If the quotient is a whole number, then 3 and 55,180,138.3333 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:

1 165,540,415
-1 -165,540,415

Let's try dividing by 4:

165,540,415 ÷ 4 = 41,385,103.75

If the quotient is a whole number, then 4 and 41,385,103.75 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:

1 165,540,415
-1 165,540,415
Keep dividing by the next highest number until you cannot divide anymore.

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

153,7618,80318,80544,01533,108,083165,540,415
-1-5-3,761-8,803-18,805-44,015-33,108,083-165,540,415

More Examples

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