A:
Positive:
1 x 1727217317 x 2467453313 x 1328628791 x 18980411319 x 1309491439 x 1200299233 x 1870710073 x 17147
Negative:
-1 x -172721731-7 x -24674533-13 x -13286287-91 x -1898041-1319 x -130949-1439 x -120029-9233 x -18707-10073 x -17147
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 172,721,731, 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 | 172,721,731 | |
| -1 | -172,721,731 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 172,721,731.
Example:
1 x 172,721,731 = 172,721,731
and
-1 x -172,721,731 = 172,721,731
Notice both answers equal 172,721,731
With that explanation out of the way, let's continue. Next, we take the number 172,721,731 and divide it by 2:
172,721,731 ÷ 2 = 86,360,865.5
If the quotient is a whole number, then 2 and 86,360,865.5 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 | 172,721,731 | |
| -1 | -172,721,731 |
Now, we try dividing 172,721,731 by 3:
172,721,731 ÷ 3 = 57,573,910.3333
If the quotient is a whole number, then 3 and 57,573,910.3333 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 | 172,721,731 | |
| -1 | -172,721,731 |
Let's try dividing by 4:
172,721,731 ÷ 4 = 43,180,432.75
If the quotient is a whole number, then 4 and 43,180,432.75 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 | 172,721,731 | |
| -1 | 172,721,731 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 1,319 | 1,439 | 9,233 | 10,073 | 17,147 | 18,707 | 120,029 | 130,949 | 1,898,041 | 13,286,287 | 24,674,533 | 172,721,731 |
| -1 | -7 | -13 | -91 | -1,319 | -1,439 | -9,233 | -10,073 | -17,147 | -18,707 | -120,029 | -130,949 | -1,898,041 | -13,286,287 | -24,674,533 | -172,721,731 |
Here are some more numbers to try:
Try the factor calculator