A:
Positive:
1 x 25725115911 x 2338646923 x 11184833253 x 1016803569 x 4521111787 x 1439576259 x 4110113087 x 19657
Negative:
-1 x -257251159-11 x -23386469-23 x -11184833-253 x -1016803-569 x -452111-1787 x -143957-6259 x -41101-13087 x -19657
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 257,251,159, 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 | 257,251,159 | |
| -1 | -257,251,159 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 257,251,159.
Example:
1 x 257,251,159 = 257,251,159
and
-1 x -257,251,159 = 257,251,159
Notice both answers equal 257,251,159
With that explanation out of the way, let's continue. Next, we take the number 257,251,159 and divide it by 2:
257,251,159 ÷ 2 = 128,625,579.5
If the quotient is a whole number, then 2 and 128,625,579.5 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 | 257,251,159 | |
| -1 | -257,251,159 |
Now, we try dividing 257,251,159 by 3:
257,251,159 ÷ 3 = 85,750,386.3333
If the quotient is a whole number, then 3 and 85,750,386.3333 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 | 257,251,159 | |
| -1 | -257,251,159 |
Let's try dividing by 4:
257,251,159 ÷ 4 = 64,312,789.75
If the quotient is a whole number, then 4 and 64,312,789.75 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 | 257,251,159 | |
| -1 | 257,251,159 |
If you did it right, you will end up with this table:
| 1 | 11 | 23 | 253 | 569 | 1,787 | 6,259 | 13,087 | 19,657 | 41,101 | 143,957 | 452,111 | 1,016,803 | 11,184,833 | 23,386,469 | 257,251,159 |
| -1 | -11 | -23 | -253 | -569 | -1,787 | -6,259 | -13,087 | -19,657 | -41,101 | -143,957 | -452,111 | -1,016,803 | -11,184,833 | -23,386,469 | -257,251,159 |
Here are some more numbers to try:
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