A:
Positive:
1 x 2050551055 x 4101102117 x 1206206585 x 2412413461 x 4448052305 x 889615233 x 391857837 x 26165
Negative:
-1 x -205055105-5 x -41011021-17 x -12062065-85 x -2412413-461 x -444805-2305 x -88961-5233 x -39185-7837 x -26165
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 205,055,105, 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 | 205,055,105 | |
| -1 | -205,055,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 205,055,105.
Example:
1 x 205,055,105 = 205,055,105
and
-1 x -205,055,105 = 205,055,105
Notice both answers equal 205,055,105
With that explanation out of the way, let's continue. Next, we take the number 205,055,105 and divide it by 2:
205,055,105 ÷ 2 = 102,527,552.5
If the quotient is a whole number, then 2 and 102,527,552.5 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 | 205,055,105 | |
| -1 | -205,055,105 |
Now, we try dividing 205,055,105 by 3:
205,055,105 ÷ 3 = 68,351,701.6667
If the quotient is a whole number, then 3 and 68,351,701.6667 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 | 205,055,105 | |
| -1 | -205,055,105 |
Let's try dividing by 4:
205,055,105 ÷ 4 = 51,263,776.25
If the quotient is a whole number, then 4 and 51,263,776.25 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 | 205,055,105 | |
| -1 | 205,055,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 461 | 2,305 | 5,233 | 7,837 | 26,165 | 39,185 | 88,961 | 444,805 | 2,412,413 | 12,062,065 | 41,011,021 | 205,055,105 |
| -1 | -5 | -17 | -85 | -461 | -2,305 | -5,233 | -7,837 | -26,165 | -39,185 | -88,961 | -444,805 | -2,412,413 | -12,062,065 | -41,011,021 | -205,055,105 |
Here are some more numbers to try:
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