A:
Positive:
1 x 1680430855 x 336086177 x 2400615535 x 480123137 x 4541705185 x 908341259 x 6488151295 x 129763
Negative:
-1 x -168043085-5 x -33608617-7 x -24006155-35 x -4801231-37 x -4541705-185 x -908341-259 x -648815-1295 x -129763
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 168,043,085, 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 | 168,043,085 | |
| -1 | -168,043,085 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 168,043,085.
Example:
1 x 168,043,085 = 168,043,085
and
-1 x -168,043,085 = 168,043,085
Notice both answers equal 168,043,085
With that explanation out of the way, let's continue. Next, we take the number 168,043,085 and divide it by 2:
168,043,085 ÷ 2 = 84,021,542.5
If the quotient is a whole number, then 2 and 84,021,542.5 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 | 168,043,085 | |
| -1 | -168,043,085 |
Now, we try dividing 168,043,085 by 3:
168,043,085 ÷ 3 = 56,014,361.6667
If the quotient is a whole number, then 3 and 56,014,361.6667 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 | 168,043,085 | |
| -1 | -168,043,085 |
Let's try dividing by 4:
168,043,085 ÷ 4 = 42,010,771.25
If the quotient is a whole number, then 4 and 42,010,771.25 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 | 168,043,085 | |
| -1 | 168,043,085 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 37 | 185 | 259 | 1,295 | 129,763 | 648,815 | 908,341 | 4,541,705 | 4,801,231 | 24,006,155 | 33,608,617 | 168,043,085 |
| -1 | -5 | -7 | -35 | -37 | -185 | -259 | -1,295 | -129,763 | -648,815 | -908,341 | -4,541,705 | -4,801,231 | -24,006,155 | -33,608,617 | -168,043,085 |
Here are some more numbers to try:
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