A:
Positive:
1 x 85064217 x 121520311 x 77331177 x 11047383 x 102487121 x 70301581 x 14641847 x 10043913 x 93171331 x 6391
Negative:
-1 x -8506421-7 x -1215203-11 x -773311-77 x -110473-83 x -102487-121 x -70301-581 x -14641-847 x -10043-913 x -9317-1331 x -6391
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 8,506,421, 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 | 8,506,421 | |
| -1 | -8,506,421 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,506,421.
Example:
1 x 8,506,421 = 8,506,421
and
-1 x -8,506,421 = 8,506,421
Notice both answers equal 8,506,421
With that explanation out of the way, let's continue. Next, we take the number 8,506,421 and divide it by 2:
8,506,421 ÷ 2 = 4,253,210.5
If the quotient is a whole number, then 2 and 4,253,210.5 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 | 8,506,421 | |
| -1 | -8,506,421 |
Now, we try dividing 8,506,421 by 3:
8,506,421 ÷ 3 = 2,835,473.6667
If the quotient is a whole number, then 3 and 2,835,473.6667 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 | 8,506,421 | |
| -1 | -8,506,421 |
Let's try dividing by 4:
8,506,421 ÷ 4 = 2,126,605.25
If the quotient is a whole number, then 4 and 2,126,605.25 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 | 8,506,421 | |
| -1 | 8,506,421 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 83 | 121 | 581 | 847 | 913 | 1,331 | 6,391 | 9,317 | 10,043 | 14,641 | 70,301 | 102,487 | 110,473 | 773,311 | 1,215,203 | 8,506,421 |
| -1 | -7 | -11 | -77 | -83 | -121 | -581 | -847 | -913 | -1,331 | -6,391 | -9,317 | -10,043 | -14,641 | -70,301 | -102,487 | -110,473 | -773,311 | -1,215,203 | -8,506,421 |
Here are some more numbers to try:
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