A:
Positive:
1 x 1981860555 x 3963721119 x 1043084523 x 861678595 x 2086169115 x 1723357437 x 4535152185 x 90703
Negative:
-1 x -198186055-5 x -39637211-19 x -10430845-23 x -8616785-95 x -2086169-115 x -1723357-437 x -453515-2185 x -90703
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 198,186,055, 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 | 198,186,055 | |
| -1 | -198,186,055 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 198,186,055.
Example:
1 x 198,186,055 = 198,186,055
and
-1 x -198,186,055 = 198,186,055
Notice both answers equal 198,186,055
With that explanation out of the way, let's continue. Next, we take the number 198,186,055 and divide it by 2:
198,186,055 ÷ 2 = 99,093,027.5
If the quotient is a whole number, then 2 and 99,093,027.5 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 | 198,186,055 | |
| -1 | -198,186,055 |
Now, we try dividing 198,186,055 by 3:
198,186,055 ÷ 3 = 66,062,018.3333
If the quotient is a whole number, then 3 and 66,062,018.3333 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 | 198,186,055 | |
| -1 | -198,186,055 |
Let's try dividing by 4:
198,186,055 ÷ 4 = 49,546,513.75
If the quotient is a whole number, then 4 and 49,546,513.75 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 | 198,186,055 | |
| -1 | 198,186,055 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 23 | 95 | 115 | 437 | 2,185 | 90,703 | 453,515 | 1,723,357 | 2,086,169 | 8,616,785 | 10,430,845 | 39,637,211 | 198,186,055 |
| -1 | -5 | -19 | -23 | -95 | -115 | -437 | -2,185 | -90,703 | -453,515 | -1,723,357 | -2,086,169 | -8,616,785 | -10,430,845 | -39,637,211 | -198,186,055 |
Here are some more numbers to try:
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