A:
Positive:
1 x 852072111 x 77461119 x 44845959 x 144419209 x 40769649 x 13129691 x 123311121 x 7601
Negative:
-1 x -8520721-11 x -774611-19 x -448459-59 x -144419-209 x -40769-649 x -13129-691 x -12331-1121 x -7601
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 8,520,721, 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 | 8,520,721 | |
| -1 | -8,520,721 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,520,721.
Example:
1 x 8,520,721 = 8,520,721
and
-1 x -8,520,721 = 8,520,721
Notice both answers equal 8,520,721
With that explanation out of the way, let's continue. Next, we take the number 8,520,721 and divide it by 2:
8,520,721 ÷ 2 = 4,260,360.5
If the quotient is a whole number, then 2 and 4,260,360.5 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 | 8,520,721 | |
| -1 | -8,520,721 |
Now, we try dividing 8,520,721 by 3:
8,520,721 ÷ 3 = 2,840,240.3333
If the quotient is a whole number, then 3 and 2,840,240.3333 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 | 8,520,721 | |
| -1 | -8,520,721 |
Let's try dividing by 4:
8,520,721 ÷ 4 = 2,130,180.25
If the quotient is a whole number, then 4 and 2,130,180.25 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 | 8,520,721 | |
| -1 | 8,520,721 |
If you did it right, you will end up with this table:
| 1 | 11 | 19 | 59 | 209 | 649 | 691 | 1,121 | 7,601 | 12,331 | 13,129 | 40,769 | 144,419 | 448,459 | 774,611 | 8,520,721 |
| -1 | -11 | -19 | -59 | -209 | -649 | -691 | -1,121 | -7,601 | -12,331 | -13,129 | -40,769 | -144,419 | -448,459 | -774,611 | -8,520,721 |
Here are some more numbers to try:
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