A:
Positive:
1 x 824022111 x 74911141 x 200981121 x 68101151 x 54571451 x 182711331 x 61911661 x 4961
Negative:
-1 x -8240221-11 x -749111-41 x -200981-121 x -68101-151 x -54571-451 x -18271-1331 x -6191-1661 x -4961
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 8,240,221, 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 | 8,240,221 | |
| -1 | -8,240,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 8,240,221.
Example:
1 x 8,240,221 = 8,240,221
and
-1 x -8,240,221 = 8,240,221
Notice both answers equal 8,240,221
With that explanation out of the way, let's continue. Next, we take the number 8,240,221 and divide it by 2:
8,240,221 ÷ 2 = 4,120,110.5
If the quotient is a whole number, then 2 and 4,120,110.5 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 | 8,240,221 | |
| -1 | -8,240,221 |
Now, we try dividing 8,240,221 by 3:
8,240,221 ÷ 3 = 2,746,740.3333
If the quotient is a whole number, then 3 and 2,746,740.3333 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 | 8,240,221 | |
| -1 | -8,240,221 |
Let's try dividing by 4:
8,240,221 ÷ 4 = 2,060,055.25
If the quotient is a whole number, then 4 and 2,060,055.25 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 | 8,240,221 | |
| -1 | 8,240,221 |
If you did it right, you will end up with this table:
| 1 | 11 | 41 | 121 | 151 | 451 | 1,331 | 1,661 | 4,961 | 6,191 | 18,271 | 54,571 | 68,101 | 200,981 | 749,111 | 8,240,221 |
| -1 | -11 | -41 | -121 | -151 | -451 | -1,331 | -1,661 | -4,961 | -6,191 | -18,271 | -54,571 | -68,101 | -200,981 | -749,111 | -8,240,221 |
Here are some more numbers to try:
Try the factor calculator