A:
Positive:
1 x 685867155 x 1371734337 x 1853695173 x 396455185 x 370739865 x 792912143 x 320056401 x 10715
Negative:
-1 x -68586715-5 x -13717343-37 x -1853695-173 x -396455-185 x -370739-865 x -79291-2143 x -32005-6401 x -10715
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 68,586,715, 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 | 68,586,715 | |
| -1 | -68,586,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,586,715.
Example:
1 x 68,586,715 = 68,586,715
and
-1 x -68,586,715 = 68,586,715
Notice both answers equal 68,586,715
With that explanation out of the way, let's continue. Next, we take the number 68,586,715 and divide it by 2:
68,586,715 ÷ 2 = 34,293,357.5
If the quotient is a whole number, then 2 and 34,293,357.5 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 | 68,586,715 | |
| -1 | -68,586,715 |
Now, we try dividing 68,586,715 by 3:
68,586,715 ÷ 3 = 22,862,238.3333
If the quotient is a whole number, then 3 and 22,862,238.3333 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 | 68,586,715 | |
| -1 | -68,586,715 |
Let's try dividing by 4:
68,586,715 ÷ 4 = 17,146,678.75
If the quotient is a whole number, then 4 and 17,146,678.75 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 | 68,586,715 | |
| -1 | 68,586,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 173 | 185 | 865 | 2,143 | 6,401 | 10,715 | 32,005 | 79,291 | 370,739 | 396,455 | 1,853,695 | 13,717,343 | 68,586,715 |
| -1 | -5 | -37 | -173 | -185 | -865 | -2,143 | -6,401 | -10,715 | -32,005 | -79,291 | -370,739 | -396,455 | -1,853,695 | -13,717,343 | -68,586,715 |
Here are some more numbers to try:
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