A:
Positive:
1 x 6718186731 x 216715743 x 1562369101 x 665167499 x 1346331333 x 503993131 x 214574343 x 15469
Negative:
-1 x -67181867-31 x -2167157-43 x -1562369-101 x -665167-499 x -134633-1333 x -50399-3131 x -21457-4343 x -15469
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 67,181,867, 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 | 67,181,867 | |
| -1 | -67,181,867 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 67,181,867.
Example:
1 x 67,181,867 = 67,181,867
and
-1 x -67,181,867 = 67,181,867
Notice both answers equal 67,181,867
With that explanation out of the way, let's continue. Next, we take the number 67,181,867 and divide it by 2:
67,181,867 ÷ 2 = 33,590,933.5
If the quotient is a whole number, then 2 and 33,590,933.5 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 | 67,181,867 | |
| -1 | -67,181,867 |
Now, we try dividing 67,181,867 by 3:
67,181,867 ÷ 3 = 22,393,955.6667
If the quotient is a whole number, then 3 and 22,393,955.6667 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 | 67,181,867 | |
| -1 | -67,181,867 |
Let's try dividing by 4:
67,181,867 ÷ 4 = 16,795,466.75
If the quotient is a whole number, then 4 and 16,795,466.75 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 | 67,181,867 | |
| -1 | 67,181,867 |
If you did it right, you will end up with this table:
| 1 | 31 | 43 | 101 | 499 | 1,333 | 3,131 | 4,343 | 15,469 | 21,457 | 50,399 | 134,633 | 665,167 | 1,562,369 | 2,167,157 | 67,181,867 |
| -1 | -31 | -43 | -101 | -499 | -1,333 | -3,131 | -4,343 | -15,469 | -21,457 | -50,399 | -134,633 | -665,167 | -1,562,369 | -2,167,157 | -67,181,867 |
Here are some more numbers to try:
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