A:
Positive:
1 x 900847155 x 180169437 x 1286924535 x 2573849631 x 1427653155 x 285534079 x 220854417 x 20395
Negative:
-1 x -90084715-5 x -18016943-7 x -12869245-35 x -2573849-631 x -142765-3155 x -28553-4079 x -22085-4417 x -20395
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 90,084,715, 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 | 90,084,715 | |
| -1 | -90,084,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 90,084,715.
Example:
1 x 90,084,715 = 90,084,715
and
-1 x -90,084,715 = 90,084,715
Notice both answers equal 90,084,715
With that explanation out of the way, let's continue. Next, we take the number 90,084,715 and divide it by 2:
90,084,715 ÷ 2 = 45,042,357.5
If the quotient is a whole number, then 2 and 45,042,357.5 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 | 90,084,715 | |
| -1 | -90,084,715 |
Now, we try dividing 90,084,715 by 3:
90,084,715 ÷ 3 = 30,028,238.3333
If the quotient is a whole number, then 3 and 30,028,238.3333 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 | 90,084,715 | |
| -1 | -90,084,715 |
Let's try dividing by 4:
90,084,715 ÷ 4 = 22,521,178.75
If the quotient is a whole number, then 4 and 22,521,178.75 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 | 90,084,715 | |
| -1 | 90,084,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 631 | 3,155 | 4,079 | 4,417 | 20,395 | 22,085 | 28,553 | 142,765 | 2,573,849 | 12,869,245 | 18,016,943 | 90,084,715 |
| -1 | -5 | -7 | -35 | -631 | -3,155 | -4,079 | -4,417 | -20,395 | -22,085 | -28,553 | -142,765 | -2,573,849 | -12,869,245 | -18,016,943 | -90,084,715 |
Here are some more numbers to try:
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