A:
Positive:
1 x 80015155 x 160030347 x 17024579 x 101285235 x 34049395 x 20257431 x 185652155 x 3713
Negative:
-1 x -8001515-5 x -1600303-47 x -170245-79 x -101285-235 x -34049-395 x -20257-431 x -18565-2155 x -3713
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 8,001,515, 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 | 8,001,515 | |
| -1 | -8,001,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,001,515.
Example:
1 x 8,001,515 = 8,001,515
and
-1 x -8,001,515 = 8,001,515
Notice both answers equal 8,001,515
With that explanation out of the way, let's continue. Next, we take the number 8,001,515 and divide it by 2:
8,001,515 ÷ 2 = 4,000,757.5
If the quotient is a whole number, then 2 and 4,000,757.5 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 | 8,001,515 | |
| -1 | -8,001,515 |
Now, we try dividing 8,001,515 by 3:
8,001,515 ÷ 3 = 2,667,171.6667
If the quotient is a whole number, then 3 and 2,667,171.6667 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 | 8,001,515 | |
| -1 | -8,001,515 |
Let's try dividing by 4:
8,001,515 ÷ 4 = 2,000,378.75
If the quotient is a whole number, then 4 and 2,000,378.75 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 | 8,001,515 | |
| -1 | 8,001,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 79 | 235 | 395 | 431 | 2,155 | 3,713 | 18,565 | 20,257 | 34,049 | 101,285 | 170,245 | 1,600,303 | 8,001,515 |
| -1 | -5 | -47 | -79 | -235 | -395 | -431 | -2,155 | -3,713 | -18,565 | -20,257 | -34,049 | -101,285 | -170,245 | -1,600,303 | -8,001,515 |
Here are some more numbers to try:
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