A:
Positive:
1 x 912203755 x 1824407525 x 3648815125 x 729763461 x 1978751583 x 576252305 x 395757915 x 11525
Negative:
-1 x -91220375-5 x -18244075-25 x -3648815-125 x -729763-461 x -197875-1583 x -57625-2305 x -39575-7915 x -11525
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 91,220,375, 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 | 91,220,375 | |
| -1 | -91,220,375 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 91,220,375.
Example:
1 x 91,220,375 = 91,220,375
and
-1 x -91,220,375 = 91,220,375
Notice both answers equal 91,220,375
With that explanation out of the way, let's continue. Next, we take the number 91,220,375 and divide it by 2:
91,220,375 ÷ 2 = 45,610,187.5
If the quotient is a whole number, then 2 and 45,610,187.5 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 | 91,220,375 | |
| -1 | -91,220,375 |
Now, we try dividing 91,220,375 by 3:
91,220,375 ÷ 3 = 30,406,791.6667
If the quotient is a whole number, then 3 and 30,406,791.6667 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 | 91,220,375 | |
| -1 | -91,220,375 |
Let's try dividing by 4:
91,220,375 ÷ 4 = 22,805,093.75
If the quotient is a whole number, then 4 and 22,805,093.75 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 | 91,220,375 | |
| -1 | 91,220,375 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 461 | 1,583 | 2,305 | 7,915 | 11,525 | 39,575 | 57,625 | 197,875 | 729,763 | 3,648,815 | 18,244,075 | 91,220,375 |
| -1 | -5 | -25 | -125 | -461 | -1,583 | -2,305 | -7,915 | -11,525 | -39,575 | -57,625 | -197,875 | -729,763 | -3,648,815 | -18,244,075 | -91,220,375 |
Here are some more numbers to try:
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