A:
Positive:
1 x 1720735155 x 3441470341 x 4196915205 x 839383761 x 2261151103 x 1560053805 x 452235515 x 31201
Negative:
-1 x -172073515-5 x -34414703-41 x -4196915-205 x -839383-761 x -226115-1103 x -156005-3805 x -45223-5515 x -31201
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 172,073,515, it is easier to work with a table - it's called factoring from the outside in.
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 | 172,073,515 | |
| -1 | -172,073,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 172,073,515.
Example:
1 x 172,073,515 = 172,073,515
and
-1 x -172,073,515 = 172,073,515
Notice both answers equal 172,073,515
With that explanation out of the way, let's continue. Next, we take the number 172,073,515 and divide it by 2:
172,073,515 ÷ 2 = 86,036,757.5
If the quotient is a whole number, then 2 and 86,036,757.5 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 | 172,073,515 | |
| -1 | -172,073,515 |
Now, we try dividing 172,073,515 by 3:
172,073,515 ÷ 3 = 57,357,838.3333
If the quotient is a whole number, then 3 and 57,357,838.3333 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 | 172,073,515 | |
| -1 | -172,073,515 |
Let's try dividing by 4:
172,073,515 ÷ 4 = 43,018,378.75
If the quotient is a whole number, then 4 and 43,018,378.75 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 | 172,073,515 | |
| -1 | 172,073,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 205 | 761 | 1,103 | 3,805 | 5,515 | 31,201 | 45,223 | 156,005 | 226,115 | 839,383 | 4,196,915 | 34,414,703 | 172,073,515 |
| -1 | -5 | -41 | -205 | -761 | -1,103 | -3,805 | -5,515 | -31,201 | -45,223 | -156,005 | -226,115 | -839,383 | -4,196,915 | -34,414,703 | -172,073,515 |
Here are some more numbers to try:
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