A:
Positive:
1 x 681636255 x 1363272517 x 400962525 x 272654585 x 801925125 x 545309425 x 1603852125 x 32077
Negative:
-1 x -68163625-5 x -13632725-17 x -4009625-25 x -2726545-85 x -801925-125 x -545309-425 x -160385-2125 x -32077
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 68,163,625, 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 | 68,163,625 | |
| -1 | -68,163,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,163,625.
Example:
1 x 68,163,625 = 68,163,625
and
-1 x -68,163,625 = 68,163,625
Notice both answers equal 68,163,625
With that explanation out of the way, let's continue. Next, we take the number 68,163,625 and divide it by 2:
68,163,625 ÷ 2 = 34,081,812.5
If the quotient is a whole number, then 2 and 34,081,812.5 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 | 68,163,625 | |
| -1 | -68,163,625 |
Now, we try dividing 68,163,625 by 3:
68,163,625 ÷ 3 = 22,721,208.3333
If the quotient is a whole number, then 3 and 22,721,208.3333 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 | 68,163,625 | |
| -1 | -68,163,625 |
Let's try dividing by 4:
68,163,625 ÷ 4 = 17,040,906.25
If the quotient is a whole number, then 4 and 17,040,906.25 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 | 68,163,625 | |
| -1 | 68,163,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 25 | 85 | 125 | 425 | 2,125 | 32,077 | 160,385 | 545,309 | 801,925 | 2,726,545 | 4,009,625 | 13,632,725 | 68,163,625 |
| -1 | -5 | -17 | -25 | -85 | -125 | -425 | -2,125 | -32,077 | -160,385 | -545,309 | -801,925 | -2,726,545 | -4,009,625 | -13,632,725 | -68,163,625 |
Here are some more numbers to try:
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