A:
Positive:
1 x 1756122117 x 103301331 x 56649147 x 373643527 x 33323709 x 24769799 x 219791457 x 12053
Negative:
-1 x -17561221-17 x -1033013-31 x -566491-47 x -373643-527 x -33323-709 x -24769-799 x -21979-1457 x -12053
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 17,561,221, 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 | 17,561,221 | |
| -1 | -17,561,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 17,561,221.
Example:
1 x 17,561,221 = 17,561,221
and
-1 x -17,561,221 = 17,561,221
Notice both answers equal 17,561,221
With that explanation out of the way, let's continue. Next, we take the number 17,561,221 and divide it by 2:
17,561,221 ÷ 2 = 8,780,610.5
If the quotient is a whole number, then 2 and 8,780,610.5 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 | 17,561,221 | |
| -1 | -17,561,221 |
Now, we try dividing 17,561,221 by 3:
17,561,221 ÷ 3 = 5,853,740.3333
If the quotient is a whole number, then 3 and 5,853,740.3333 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 | 17,561,221 | |
| -1 | -17,561,221 |
Let's try dividing by 4:
17,561,221 ÷ 4 = 4,390,305.25
If the quotient is a whole number, then 4 and 4,390,305.25 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 | 17,561,221 | |
| -1 | 17,561,221 |
If you did it right, you will end up with this table:
| 1 | 17 | 31 | 47 | 527 | 709 | 799 | 1,457 | 12,053 | 21,979 | 24,769 | 33,323 | 373,643 | 566,491 | 1,033,013 | 17,561,221 |
| -1 | -17 | -31 | -47 | -527 | -709 | -799 | -1,457 | -12,053 | -21,979 | -24,769 | -33,323 | -373,643 | -566,491 | -1,033,013 | -17,561,221 |
Here are some more numbers to try:
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