A:
Positive:
1 x 2578107255 x 5156214525 x 1031242929 x 889002531 x 8316475145 x 1778005155 x 1663295725 x 355601775 x 332659899 x 2867754495 x 5735511471 x 22475
Negative:
-1 x -257810725-5 x -51562145-25 x -10312429-29 x -8890025-31 x -8316475-145 x -1778005-155 x -1663295-725 x -355601-775 x -332659-899 x -286775-4495 x -57355-11471 x -22475
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 257,810,725, 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 | 257,810,725 | |
| -1 | -257,810,725 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 257,810,725.
Example:
1 x 257,810,725 = 257,810,725
and
-1 x -257,810,725 = 257,810,725
Notice both answers equal 257,810,725
With that explanation out of the way, let's continue. Next, we take the number 257,810,725 and divide it by 2:
257,810,725 ÷ 2 = 128,905,362.5
If the quotient is a whole number, then 2 and 128,905,362.5 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 | 257,810,725 | |
| -1 | -257,810,725 |
Now, we try dividing 257,810,725 by 3:
257,810,725 ÷ 3 = 85,936,908.3333
If the quotient is a whole number, then 3 and 85,936,908.3333 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 | 257,810,725 | |
| -1 | -257,810,725 |
Let's try dividing by 4:
257,810,725 ÷ 4 = 64,452,681.25
If the quotient is a whole number, then 4 and 64,452,681.25 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 | 257,810,725 | |
| -1 | 257,810,725 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 29 | 31 | 145 | 155 | 725 | 775 | 899 | 4,495 | 11,471 | 22,475 | 57,355 | 286,775 | 332,659 | 355,601 | 1,663,295 | 1,778,005 | 8,316,475 | 8,890,025 | 10,312,429 | 51,562,145 | 257,810,725 |
| -1 | -5 | -25 | -29 | -31 | -145 | -155 | -725 | -775 | -899 | -4,495 | -11,471 | -22,475 | -57,355 | -286,775 | -332,659 | -355,601 | -1,663,295 | -1,778,005 | -8,316,475 | -8,890,025 | -10,312,429 | -51,562,145 | -257,810,725 |
Here are some more numbers to try:
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