A:
Positive:
1 x 868080855 x 173616177 x 1240115513 x 667754535 x 248023165 x 133550991 x 953935455 x 190787
Negative:
-1 x -86808085-5 x -17361617-7 x -12401155-13 x -6677545-35 x -2480231-65 x -1335509-91 x -953935-455 x -190787
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 86,808,085, 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 | 86,808,085 | |
| -1 | -86,808,085 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 86,808,085.
Example:
1 x 86,808,085 = 86,808,085
and
-1 x -86,808,085 = 86,808,085
Notice both answers equal 86,808,085
With that explanation out of the way, let's continue. Next, we take the number 86,808,085 and divide it by 2:
86,808,085 ÷ 2 = 43,404,042.5
If the quotient is a whole number, then 2 and 43,404,042.5 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 | 86,808,085 | |
| -1 | -86,808,085 |
Now, we try dividing 86,808,085 by 3:
86,808,085 ÷ 3 = 28,936,028.3333
If the quotient is a whole number, then 3 and 28,936,028.3333 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 | 86,808,085 | |
| -1 | -86,808,085 |
Let's try dividing by 4:
86,808,085 ÷ 4 = 21,702,021.25
If the quotient is a whole number, then 4 and 21,702,021.25 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 | 86,808,085 | |
| -1 | 86,808,085 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 455 | 190,787 | 953,935 | 1,335,509 | 2,480,231 | 6,677,545 | 12,401,155 | 17,361,617 | 86,808,085 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -455 | -190,787 | -953,935 | -1,335,509 | -2,480,231 | -6,677,545 | -12,401,155 | -17,361,617 | -86,808,085 |
Here are some more numbers to try:
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