A:
Positive:
1 x 688177497 x 983110711 x 625615913 x 529367377 x 89373791 x 756239143 x 4812431001 x 68749
Negative:
-1 x -68817749-7 x -9831107-11 x -6256159-13 x -5293673-77 x -893737-91 x -756239-143 x -481243-1001 x -68749
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 68,817,749, 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 | 68,817,749 | |
| -1 | -68,817,749 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,817,749.
Example:
1 x 68,817,749 = 68,817,749
and
-1 x -68,817,749 = 68,817,749
Notice both answers equal 68,817,749
With that explanation out of the way, let's continue. Next, we take the number 68,817,749 and divide it by 2:
68,817,749 ÷ 2 = 34,408,874.5
If the quotient is a whole number, then 2 and 34,408,874.5 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 | 68,817,749 | |
| -1 | -68,817,749 |
Now, we try dividing 68,817,749 by 3:
68,817,749 ÷ 3 = 22,939,249.6667
If the quotient is a whole number, then 3 and 22,939,249.6667 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 | 68,817,749 | |
| -1 | -68,817,749 |
Let's try dividing by 4:
68,817,749 ÷ 4 = 17,204,437.25
If the quotient is a whole number, then 4 and 17,204,437.25 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 | 68,817,749 | |
| -1 | 68,817,749 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 77 | 91 | 143 | 1,001 | 68,749 | 481,243 | 756,239 | 893,737 | 5,293,673 | 6,256,159 | 9,831,107 | 68,817,749 |
| -1 | -7 | -11 | -13 | -77 | -91 | -143 | -1,001 | -68,749 | -481,243 | -756,239 | -893,737 | -5,293,673 | -6,256,159 | -9,831,107 | -68,817,749 |
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