A:
Positive:
1 x 909498655 x 1818997319 x 478683595 x 957367281 x 3236651405 x 647333407 x 266955339 x 17035
Negative:
-1 x -90949865-5 x -18189973-19 x -4786835-95 x -957367-281 x -323665-1405 x -64733-3407 x -26695-5339 x -17035
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 90,949,865, 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 | 90,949,865 | |
| -1 | -90,949,865 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 90,949,865.
Example:
1 x 90,949,865 = 90,949,865
and
-1 x -90,949,865 = 90,949,865
Notice both answers equal 90,949,865
With that explanation out of the way, let's continue. Next, we take the number 90,949,865 and divide it by 2:
90,949,865 ÷ 2 = 45,474,932.5
If the quotient is a whole number, then 2 and 45,474,932.5 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 | 90,949,865 | |
| -1 | -90,949,865 |
Now, we try dividing 90,949,865 by 3:
90,949,865 ÷ 3 = 30,316,621.6667
If the quotient is a whole number, then 3 and 30,316,621.6667 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 | 90,949,865 | |
| -1 | -90,949,865 |
Let's try dividing by 4:
90,949,865 ÷ 4 = 22,737,466.25
If the quotient is a whole number, then 4 and 22,737,466.25 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 | 90,949,865 | |
| -1 | 90,949,865 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 281 | 1,405 | 3,407 | 5,339 | 17,035 | 26,695 | 64,733 | 323,665 | 957,367 | 4,786,835 | 18,189,973 | 90,949,865 |
| -1 | -5 | -19 | -95 | -281 | -1,405 | -3,407 | -5,339 | -17,035 | -26,695 | -64,733 | -323,665 | -957,367 | -4,786,835 | -18,189,973 | -90,949,865 |
Here are some more numbers to try:
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