A:
Positive:
1 x 9127855917 x 536932723 x 396863347 x 1942097391 x 233449799 x 1142411081 x 844394967 x 18377
Negative:
-1 x -91278559-17 x -5369327-23 x -3968633-47 x -1942097-391 x -233449-799 x -114241-1081 x -84439-4967 x -18377
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 91,278,559, 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 | 91,278,559 | |
| -1 | -91,278,559 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 91,278,559.
Example:
1 x 91,278,559 = 91,278,559
and
-1 x -91,278,559 = 91,278,559
Notice both answers equal 91,278,559
With that explanation out of the way, let's continue. Next, we take the number 91,278,559 and divide it by 2:
91,278,559 ÷ 2 = 45,639,279.5
If the quotient is a whole number, then 2 and 45,639,279.5 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 | 91,278,559 | |
| -1 | -91,278,559 |
Now, we try dividing 91,278,559 by 3:
91,278,559 ÷ 3 = 30,426,186.3333
If the quotient is a whole number, then 3 and 30,426,186.3333 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 | 91,278,559 | |
| -1 | -91,278,559 |
Let's try dividing by 4:
91,278,559 ÷ 4 = 22,819,639.75
If the quotient is a whole number, then 4 and 22,819,639.75 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 | 91,278,559 | |
| -1 | 91,278,559 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 47 | 391 | 799 | 1,081 | 4,967 | 18,377 | 84,439 | 114,241 | 233,449 | 1,942,097 | 3,968,633 | 5,369,327 | 91,278,559 |
| -1 | -17 | -23 | -47 | -391 | -799 | -1,081 | -4,967 | -18,377 | -84,439 | -114,241 | -233,449 | -1,942,097 | -3,968,633 | -5,369,327 | -91,278,559 |
Here are some more numbers to try:
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