A:
Positive:
1 x 2042171455 x 4084342911 x 1856519555 x 3713039121 x 1687745227 x 899635605 x 3375491135 x 1799271487 x 1373352497 x 817857435 x 2746712485 x 16357
Negative:
-1 x -204217145-5 x -40843429-11 x -18565195-55 x -3713039-121 x -1687745-227 x -899635-605 x -337549-1135 x -179927-1487 x -137335-2497 x -81785-7435 x -27467-12485 x -16357
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 204,217,145, 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 | 204,217,145 | |
| -1 | -204,217,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 204,217,145.
Example:
1 x 204,217,145 = 204,217,145
and
-1 x -204,217,145 = 204,217,145
Notice both answers equal 204,217,145
With that explanation out of the way, let's continue. Next, we take the number 204,217,145 and divide it by 2:
204,217,145 ÷ 2 = 102,108,572.5
If the quotient is a whole number, then 2 and 102,108,572.5 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 | 204,217,145 | |
| -1 | -204,217,145 |
Now, we try dividing 204,217,145 by 3:
204,217,145 ÷ 3 = 68,072,381.6667
If the quotient is a whole number, then 3 and 68,072,381.6667 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 | 204,217,145 | |
| -1 | -204,217,145 |
Let's try dividing by 4:
204,217,145 ÷ 4 = 51,054,286.25
If the quotient is a whole number, then 4 and 51,054,286.25 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 | 204,217,145 | |
| -1 | 204,217,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 121 | 227 | 605 | 1,135 | 1,487 | 2,497 | 7,435 | 12,485 | 16,357 | 27,467 | 81,785 | 137,335 | 179,927 | 337,549 | 899,635 | 1,687,745 | 3,713,039 | 18,565,195 | 40,843,429 | 204,217,145 |
| -1 | -5 | -11 | -55 | -121 | -227 | -605 | -1,135 | -1,487 | -2,497 | -7,435 | -12,485 | -16,357 | -27,467 | -81,785 | -137,335 | -179,927 | -337,549 | -899,635 | -1,687,745 | -3,713,039 | -18,565,195 | -40,843,429 | -204,217,145 |
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