A:
Positive:
1 x 870023055 x 1740046113 x 669248565 x 133849779 x 1101295395 x 2202591027 x 847155135 x 16943
Negative:
-1 x -87002305-5 x -17400461-13 x -6692485-65 x -1338497-79 x -1101295-395 x -220259-1027 x -84715-5135 x -16943
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 87,002,305, 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 | 87,002,305 | |
| -1 | -87,002,305 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 87,002,305.
Example:
1 x 87,002,305 = 87,002,305
and
-1 x -87,002,305 = 87,002,305
Notice both answers equal 87,002,305
With that explanation out of the way, let's continue. Next, we take the number 87,002,305 and divide it by 2:
87,002,305 ÷ 2 = 43,501,152.5
If the quotient is a whole number, then 2 and 43,501,152.5 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 | 87,002,305 | |
| -1 | -87,002,305 |
Now, we try dividing 87,002,305 by 3:
87,002,305 ÷ 3 = 29,000,768.3333
If the quotient is a whole number, then 3 and 29,000,768.3333 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 | 87,002,305 | |
| -1 | -87,002,305 |
Let's try dividing by 4:
87,002,305 ÷ 4 = 21,750,576.25
If the quotient is a whole number, then 4 and 21,750,576.25 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 | 87,002,305 | |
| -1 | 87,002,305 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 79 | 395 | 1,027 | 5,135 | 16,943 | 84,715 | 220,259 | 1,101,295 | 1,338,497 | 6,692,485 | 17,400,461 | 87,002,305 |
| -1 | -5 | -13 | -65 | -79 | -395 | -1,027 | -5,135 | -16,943 | -84,715 | -220,259 | -1,101,295 | -1,338,497 | -6,692,485 | -17,400,461 | -87,002,305 |
Here are some more numbers to try:
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