A:
Positive:
1 x 2566004055 x 5132008197 x 2645365317 x 809465485 x 5290731585 x 1618931669 x 1537458345 x 30749
Negative:
-1 x -256600405-5 x -51320081-97 x -2645365-317 x -809465-485 x -529073-1585 x -161893-1669 x -153745-8345 x -30749
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 256,600,405, 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 | 256,600,405 | |
| -1 | -256,600,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 256,600,405.
Example:
1 x 256,600,405 = 256,600,405
and
-1 x -256,600,405 = 256,600,405
Notice both answers equal 256,600,405
With that explanation out of the way, let's continue. Next, we take the number 256,600,405 and divide it by 2:
256,600,405 ÷ 2 = 128,300,202.5
If the quotient is a whole number, then 2 and 128,300,202.5 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 | 256,600,405 | |
| -1 | -256,600,405 |
Now, we try dividing 256,600,405 by 3:
256,600,405 ÷ 3 = 85,533,468.3333
If the quotient is a whole number, then 3 and 85,533,468.3333 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 | 256,600,405 | |
| -1 | -256,600,405 |
Let's try dividing by 4:
256,600,405 ÷ 4 = 64,150,101.25
If the quotient is a whole number, then 4 and 64,150,101.25 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 | 256,600,405 | |
| -1 | 256,600,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 97 | 317 | 485 | 1,585 | 1,669 | 8,345 | 30,749 | 153,745 | 161,893 | 529,073 | 809,465 | 2,645,365 | 51,320,081 | 256,600,405 |
| -1 | -5 | -97 | -317 | -485 | -1,585 | -1,669 | -8,345 | -30,749 | -153,745 | -161,893 | -529,073 | -809,465 | -2,645,365 | -51,320,081 | -256,600,405 |
Here are some more numbers to try:
Try the factor calculator