A:
Positive:
1 x 2612566555 x 5225133111 x 2375060523 x 1135898555 x 4750121115 x 2271797253 x 10326351265 x 206527
Negative:
-1 x -261256655-5 x -52251331-11 x -23750605-23 x -11358985-55 x -4750121-115 x -2271797-253 x -1032635-1265 x -206527
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 261,256,655, 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 | 261,256,655 | |
| -1 | -261,256,655 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 261,256,655.
Example:
1 x 261,256,655 = 261,256,655
and
-1 x -261,256,655 = 261,256,655
Notice both answers equal 261,256,655
With that explanation out of the way, let's continue. Next, we take the number 261,256,655 and divide it by 2:
261,256,655 ÷ 2 = 130,628,327.5
If the quotient is a whole number, then 2 and 130,628,327.5 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 | 261,256,655 | |
| -1 | -261,256,655 |
Now, we try dividing 261,256,655 by 3:
261,256,655 ÷ 3 = 87,085,551.6667
If the quotient is a whole number, then 3 and 87,085,551.6667 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 | 261,256,655 | |
| -1 | -261,256,655 |
Let's try dividing by 4:
261,256,655 ÷ 4 = 65,314,163.75
If the quotient is a whole number, then 4 and 65,314,163.75 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 | 261,256,655 | |
| -1 | 261,256,655 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 23 | 55 | 115 | 253 | 1,265 | 206,527 | 1,032,635 | 2,271,797 | 4,750,121 | 11,358,985 | 23,750,605 | 52,251,331 | 261,256,655 |
| -1 | -5 | -11 | -23 | -55 | -115 | -253 | -1,265 | -206,527 | -1,032,635 | -2,271,797 | -4,750,121 | -11,358,985 | -23,750,605 | -52,251,331 | -261,256,655 |
Here are some more numbers to try:
Try the factor calculator