A:
Positive:
1 x 908891055 x 1817782179 x 1150495109 x 833845395 x 230099545 x 1667692111 x 430558611 x 10555
Negative:
-1 x -90889105-5 x -18177821-79 x -1150495-109 x -833845-395 x -230099-545 x -166769-2111 x -43055-8611 x -10555
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 90,889,105, 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 | 90,889,105 | |
| -1 | -90,889,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 90,889,105.
Example:
1 x 90,889,105 = 90,889,105
and
-1 x -90,889,105 = 90,889,105
Notice both answers equal 90,889,105
With that explanation out of the way, let's continue. Next, we take the number 90,889,105 and divide it by 2:
90,889,105 ÷ 2 = 45,444,552.5
If the quotient is a whole number, then 2 and 45,444,552.5 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 | 90,889,105 | |
| -1 | -90,889,105 |
Now, we try dividing 90,889,105 by 3:
90,889,105 ÷ 3 = 30,296,368.3333
If the quotient is a whole number, then 3 and 30,296,368.3333 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 | 90,889,105 | |
| -1 | -90,889,105 |
Let's try dividing by 4:
90,889,105 ÷ 4 = 22,722,276.25
If the quotient is a whole number, then 4 and 22,722,276.25 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 | 90,889,105 | |
| -1 | 90,889,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 79 | 109 | 395 | 545 | 2,111 | 8,611 | 10,555 | 43,055 | 166,769 | 230,099 | 833,845 | 1,150,495 | 18,177,821 | 90,889,105 |
| -1 | -5 | -79 | -109 | -395 | -545 | -2,111 | -8,611 | -10,555 | -43,055 | -166,769 | -230,099 | -833,845 | -1,150,495 | -18,177,821 | -90,889,105 |
Here are some more numbers to try:
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