A:
Positive:
1 x 872892237 x 12469889113 x 772471211 x 413693523 x 166901791 x 1103531477 x 590993661 x 23843
Negative:
-1 x -87289223-7 x -12469889-113 x -772471-211 x -413693-523 x -166901-791 x -110353-1477 x -59099-3661 x -23843
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 87,289,223, 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 | 87,289,223 | |
| -1 | -87,289,223 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 87,289,223.
Example:
1 x 87,289,223 = 87,289,223
and
-1 x -87,289,223 = 87,289,223
Notice both answers equal 87,289,223
With that explanation out of the way, let's continue. Next, we take the number 87,289,223 and divide it by 2:
87,289,223 ÷ 2 = 43,644,611.5
If the quotient is a whole number, then 2 and 43,644,611.5 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 | 87,289,223 | |
| -1 | -87,289,223 |
Now, we try dividing 87,289,223 by 3:
87,289,223 ÷ 3 = 29,096,407.6667
If the quotient is a whole number, then 3 and 29,096,407.6667 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 | 87,289,223 | |
| -1 | -87,289,223 |
Let's try dividing by 4:
87,289,223 ÷ 4 = 21,822,305.75
If the quotient is a whole number, then 4 and 21,822,305.75 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 | 87,289,223 | |
| -1 | 87,289,223 |
If you did it right, you will end up with this table:
| 1 | 7 | 113 | 211 | 523 | 791 | 1,477 | 3,661 | 23,843 | 59,099 | 110,353 | 166,901 | 413,693 | 772,471 | 12,469,889 | 87,289,223 |
| -1 | -7 | -113 | -211 | -523 | -791 | -1,477 | -3,661 | -23,843 | -59,099 | -110,353 | -166,901 | -413,693 | -772,471 | -12,469,889 | -87,289,223 |
Here are some more numbers to try:
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