A:
Positive:
1 x 2158373055 x 43167461179 x 1205795349 x 618445691 x 312355895 x 2411591745 x 1236893455 x 62471
Negative:
-1 x -215837305-5 x -43167461-179 x -1205795-349 x -618445-691 x -312355-895 x -241159-1745 x -123689-3455 x -62471
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 215,837,305, 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 | 215,837,305 | |
| -1 | -215,837,305 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 215,837,305.
Example:
1 x 215,837,305 = 215,837,305
and
-1 x -215,837,305 = 215,837,305
Notice both answers equal 215,837,305
With that explanation out of the way, let's continue. Next, we take the number 215,837,305 and divide it by 2:
215,837,305 ÷ 2 = 107,918,652.5
If the quotient is a whole number, then 2 and 107,918,652.5 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 | 215,837,305 | |
| -1 | -215,837,305 |
Now, we try dividing 215,837,305 by 3:
215,837,305 ÷ 3 = 71,945,768.3333
If the quotient is a whole number, then 3 and 71,945,768.3333 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 | 215,837,305 | |
| -1 | -215,837,305 |
Let's try dividing by 4:
215,837,305 ÷ 4 = 53,959,326.25
If the quotient is a whole number, then 4 and 53,959,326.25 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 | 215,837,305 | |
| -1 | 215,837,305 |
If you did it right, you will end up with this table:
| 1 | 5 | 179 | 349 | 691 | 895 | 1,745 | 3,455 | 62,471 | 123,689 | 241,159 | 312,355 | 618,445 | 1,205,795 | 43,167,461 | 215,837,305 |
| -1 | -5 | -179 | -349 | -691 | -895 | -1,745 | -3,455 | -62,471 | -123,689 | -241,159 | -312,355 | -618,445 | -1,205,795 | -43,167,461 | -215,837,305 |
Here are some more numbers to try:
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