A:
Positive:
1 x 25182781717 x 14813401107 x 2353531167 x 1507951829 x 3037731819 x 1384432839 x 8870314093 x 17869
Negative:
-1 x -251827817-17 x -14813401-107 x -2353531-167 x -1507951-829 x -303773-1819 x -138443-2839 x -88703-14093 x -17869
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 251,827,817, 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 | 251,827,817 | |
| -1 | -251,827,817 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 251,827,817.
Example:
1 x 251,827,817 = 251,827,817
and
-1 x -251,827,817 = 251,827,817
Notice both answers equal 251,827,817
With that explanation out of the way, let's continue. Next, we take the number 251,827,817 and divide it by 2:
251,827,817 ÷ 2 = 125,913,908.5
If the quotient is a whole number, then 2 and 125,913,908.5 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 | 251,827,817 | |
| -1 | -251,827,817 |
Now, we try dividing 251,827,817 by 3:
251,827,817 ÷ 3 = 83,942,605.6667
If the quotient is a whole number, then 3 and 83,942,605.6667 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 | 251,827,817 | |
| -1 | -251,827,817 |
Let's try dividing by 4:
251,827,817 ÷ 4 = 62,956,954.25
If the quotient is a whole number, then 4 and 62,956,954.25 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 | 251,827,817 | |
| -1 | 251,827,817 |
If you did it right, you will end up with this table:
| 1 | 17 | 107 | 167 | 829 | 1,819 | 2,839 | 14,093 | 17,869 | 88,703 | 138,443 | 303,773 | 1,507,951 | 2,353,531 | 14,813,401 | 251,827,817 |
| -1 | -17 | -107 | -167 | -829 | -1,819 | -2,839 | -14,093 | -17,869 | -88,703 | -138,443 | -303,773 | -1,507,951 | -2,353,531 | -14,813,401 | -251,827,817 |
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