A:
Positive:
1 x 851581913 x 65506319 x 44820123 x 370253247 x 34477299 x 28481437 x 194871499 x 5681
Negative:
-1 x -8515819-13 x -655063-19 x -448201-23 x -370253-247 x -34477-299 x -28481-437 x -19487-1499 x -5681
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 8,515,819, 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 | 8,515,819 | |
| -1 | -8,515,819 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,515,819.
Example:
1 x 8,515,819 = 8,515,819
and
-1 x -8,515,819 = 8,515,819
Notice both answers equal 8,515,819
With that explanation out of the way, let's continue. Next, we take the number 8,515,819 and divide it by 2:
8,515,819 ÷ 2 = 4,257,909.5
If the quotient is a whole number, then 2 and 4,257,909.5 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 | 8,515,819 | |
| -1 | -8,515,819 |
Now, we try dividing 8,515,819 by 3:
8,515,819 ÷ 3 = 2,838,606.3333
If the quotient is a whole number, then 3 and 2,838,606.3333 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 | 8,515,819 | |
| -1 | -8,515,819 |
Let's try dividing by 4:
8,515,819 ÷ 4 = 2,128,954.75
If the quotient is a whole number, then 4 and 2,128,954.75 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 | 8,515,819 | |
| -1 | 8,515,819 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 23 | 247 | 299 | 437 | 1,499 | 5,681 | 19,487 | 28,481 | 34,477 | 370,253 | 448,201 | 655,063 | 8,515,819 |
| -1 | -13 | -19 | -23 | -247 | -299 | -437 | -1,499 | -5,681 | -19,487 | -28,481 | -34,477 | -370,253 | -448,201 | -655,063 | -8,515,819 |
Here are some more numbers to try:
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