A:
Positive:
1 x 87872155 x 175744317 x 51689519 x 46248585 x 10337995 x 92497323 x 272051615 x 5441
Negative:
-1 x -8787215-5 x -1757443-17 x -516895-19 x -462485-85 x -103379-95 x -92497-323 x -27205-1615 x -5441
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 8,787,215, 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 | 8,787,215 | |
| -1 | -8,787,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,787,215.
Example:
1 x 8,787,215 = 8,787,215
and
-1 x -8,787,215 = 8,787,215
Notice both answers equal 8,787,215
With that explanation out of the way, let's continue. Next, we take the number 8,787,215 and divide it by 2:
8,787,215 ÷ 2 = 4,393,607.5
If the quotient is a whole number, then 2 and 4,393,607.5 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 | 8,787,215 | |
| -1 | -8,787,215 |
Now, we try dividing 8,787,215 by 3:
8,787,215 ÷ 3 = 2,929,071.6667
If the quotient is a whole number, then 3 and 2,929,071.6667 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 | 8,787,215 | |
| -1 | -8,787,215 |
Let's try dividing by 4:
8,787,215 ÷ 4 = 2,196,803.75
If the quotient is a whole number, then 4 and 2,196,803.75 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 | 8,787,215 | |
| -1 | 8,787,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 19 | 85 | 95 | 323 | 1,615 | 5,441 | 27,205 | 92,497 | 103,379 | 462,485 | 516,895 | 1,757,443 | 8,787,215 |
| -1 | -5 | -17 | -19 | -85 | -95 | -323 | -1,615 | -5,441 | -27,205 | -92,497 | -103,379 | -462,485 | -516,895 | -1,757,443 | -8,787,215 |
Here are some more numbers to try:
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