A:
Positive:
1 x 6828519113 x 5252707101 x 676091131 x 521261397 x 1720031313 x 520071703 x 400975161 x 13231
Negative:
-1 x -68285191-13 x -5252707-101 x -676091-131 x -521261-397 x -172003-1313 x -52007-1703 x -40097-5161 x -13231
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 68,285,191, 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 | 68,285,191 | |
| -1 | -68,285,191 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,285,191.
Example:
1 x 68,285,191 = 68,285,191
and
-1 x -68,285,191 = 68,285,191
Notice both answers equal 68,285,191
With that explanation out of the way, let's continue. Next, we take the number 68,285,191 and divide it by 2:
68,285,191 ÷ 2 = 34,142,595.5
If the quotient is a whole number, then 2 and 34,142,595.5 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 | 68,285,191 | |
| -1 | -68,285,191 |
Now, we try dividing 68,285,191 by 3:
68,285,191 ÷ 3 = 22,761,730.3333
If the quotient is a whole number, then 3 and 22,761,730.3333 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 | 68,285,191 | |
| -1 | -68,285,191 |
Let's try dividing by 4:
68,285,191 ÷ 4 = 17,071,297.75
If the quotient is a whole number, then 4 and 17,071,297.75 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 | 68,285,191 | |
| -1 | 68,285,191 |
If you did it right, you will end up with this table:
| 1 | 13 | 101 | 131 | 397 | 1,313 | 1,703 | 5,161 | 13,231 | 40,097 | 52,007 | 172,003 | 521,261 | 676,091 | 5,252,707 | 68,285,191 |
| -1 | -13 | -101 | -131 | -397 | -1,313 | -1,703 | -5,161 | -13,231 | -40,097 | -52,007 | -172,003 | -521,261 | -676,091 | -5,252,707 | -68,285,191 |
Here are some more numbers to try:
Try the factor calculator