A:
Positive:
1 x 2547811497 x 3639730737 x 688597743 x 5925143259 x 983711301 x 8464491591 x 16013911137 x 22877
Negative:
-1 x -254781149-7 x -36397307-37 x -6885977-43 x -5925143-259 x -983711-301 x -846449-1591 x -160139-11137 x -22877
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 254,781,149, 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 | 254,781,149 | |
| -1 | -254,781,149 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 254,781,149.
Example:
1 x 254,781,149 = 254,781,149
and
-1 x -254,781,149 = 254,781,149
Notice both answers equal 254,781,149
With that explanation out of the way, let's continue. Next, we take the number 254,781,149 and divide it by 2:
254,781,149 ÷ 2 = 127,390,574.5
If the quotient is a whole number, then 2 and 127,390,574.5 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 | 254,781,149 | |
| -1 | -254,781,149 |
Now, we try dividing 254,781,149 by 3:
254,781,149 ÷ 3 = 84,927,049.6667
If the quotient is a whole number, then 3 and 84,927,049.6667 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 | 254,781,149 | |
| -1 | -254,781,149 |
Let's try dividing by 4:
254,781,149 ÷ 4 = 63,695,287.25
If the quotient is a whole number, then 4 and 63,695,287.25 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 | 254,781,149 | |
| -1 | 254,781,149 |
If you did it right, you will end up with this table:
| 1 | 7 | 37 | 43 | 259 | 301 | 1,591 | 11,137 | 22,877 | 160,139 | 846,449 | 983,711 | 5,925,143 | 6,885,977 | 36,397,307 | 254,781,149 |
| -1 | -7 | -37 | -43 | -259 | -301 | -1,591 | -11,137 | -22,877 | -160,139 | -846,449 | -983,711 | -5,925,143 | -6,885,977 | -36,397,307 | -254,781,149 |
Here are some more numbers to try:
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