A:
Positive:
1 x 900840717 x 1286915311 x 818946117 x 529906377 x 1169923119 x 757009187 x 4817331309 x 68819
Negative:
-1 x -90084071-7 x -12869153-11 x -8189461-17 x -5299063-77 x -1169923-119 x -757009-187 x -481733-1309 x -68819
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 90,084,071, 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 | 90,084,071 | |
| -1 | -90,084,071 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 90,084,071.
Example:
1 x 90,084,071 = 90,084,071
and
-1 x -90,084,071 = 90,084,071
Notice both answers equal 90,084,071
With that explanation out of the way, let's continue. Next, we take the number 90,084,071 and divide it by 2:
90,084,071 ÷ 2 = 45,042,035.5
If the quotient is a whole number, then 2 and 45,042,035.5 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 | 90,084,071 | |
| -1 | -90,084,071 |
Now, we try dividing 90,084,071 by 3:
90,084,071 ÷ 3 = 30,028,023.6667
If the quotient is a whole number, then 3 and 30,028,023.6667 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 | 90,084,071 | |
| -1 | -90,084,071 |
Let's try dividing by 4:
90,084,071 ÷ 4 = 22,521,017.75
If the quotient is a whole number, then 4 and 22,521,017.75 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 | 90,084,071 | |
| -1 | 90,084,071 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 187 | 1,309 | 68,819 | 481,733 | 757,009 | 1,169,923 | 5,299,063 | 8,189,461 | 12,869,153 | 90,084,071 |
| -1 | -7 | -11 | -17 | -77 | -119 | -187 | -1,309 | -68,819 | -481,733 | -757,009 | -1,169,923 | -5,299,063 | -8,189,461 | -12,869,153 | -90,084,071 |
Here are some more numbers to try:
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