A:
Positive:
1 x 2140431711 x 194584719 x 112654347 x 455411209 x 102413517 x 41401893 x 239692179 x 9823
Negative:
-1 x -21404317-11 x -1945847-19 x -1126543-47 x -455411-209 x -102413-517 x -41401-893 x -23969-2179 x -9823
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 21,404,317, 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 | 21,404,317 | |
| -1 | -21,404,317 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,404,317.
Example:
1 x 21,404,317 = 21,404,317
and
-1 x -21,404,317 = 21,404,317
Notice both answers equal 21,404,317
With that explanation out of the way, let's continue. Next, we take the number 21,404,317 and divide it by 2:
21,404,317 ÷ 2 = 10,702,158.5
If the quotient is a whole number, then 2 and 10,702,158.5 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 | 21,404,317 | |
| -1 | -21,404,317 |
Now, we try dividing 21,404,317 by 3:
21,404,317 ÷ 3 = 7,134,772.3333
If the quotient is a whole number, then 3 and 7,134,772.3333 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 | 21,404,317 | |
| -1 | -21,404,317 |
Let's try dividing by 4:
21,404,317 ÷ 4 = 5,351,079.25
If the quotient is a whole number, then 4 and 5,351,079.25 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 | 21,404,317 | |
| -1 | 21,404,317 |
If you did it right, you will end up with this table:
| 1 | 11 | 19 | 47 | 209 | 517 | 893 | 2,179 | 9,823 | 23,969 | 41,401 | 102,413 | 455,411 | 1,126,543 | 1,945,847 | 21,404,317 |
| -1 | -11 | -19 | -47 | -209 | -517 | -893 | -2,179 | -9,823 | -23,969 | -41,401 | -102,413 | -455,411 | -1,126,543 | -1,945,847 | -21,404,317 |
Here are some more numbers to try:
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