A:
Positive:
1 x 681718737 x 973883911 x 619744377 x 885349593 x 1149611493 x 456614151 x 164236523 x 10451
Negative:
-1 x -68171873-7 x -9738839-11 x -6197443-77 x -885349-593 x -114961-1493 x -45661-4151 x -16423-6523 x -10451
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 68,171,873, 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 | 68,171,873 | |
| -1 | -68,171,873 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,171,873.
Example:
1 x 68,171,873 = 68,171,873
and
-1 x -68,171,873 = 68,171,873
Notice both answers equal 68,171,873
With that explanation out of the way, let's continue. Next, we take the number 68,171,873 and divide it by 2:
68,171,873 ÷ 2 = 34,085,936.5
If the quotient is a whole number, then 2 and 34,085,936.5 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 | 68,171,873 | |
| -1 | -68,171,873 |
Now, we try dividing 68,171,873 by 3:
68,171,873 ÷ 3 = 22,723,957.6667
If the quotient is a whole number, then 3 and 22,723,957.6667 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 | 68,171,873 | |
| -1 | -68,171,873 |
Let's try dividing by 4:
68,171,873 ÷ 4 = 17,042,968.25
If the quotient is a whole number, then 4 and 17,042,968.25 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 | 68,171,873 | |
| -1 | 68,171,873 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 593 | 1,493 | 4,151 | 6,523 | 10,451 | 16,423 | 45,661 | 114,961 | 885,349 | 6,197,443 | 9,738,839 | 68,171,873 |
| -1 | -7 | -11 | -77 | -593 | -1,493 | -4,151 | -6,523 | -10,451 | -16,423 | -45,661 | -114,961 | -885,349 | -6,197,443 | -9,738,839 | -68,171,873 |
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