A:
Positive:
1 x 2169104311 x 197191329 x 74796797 x 223619319 x 67997701 x 309431067 x 203292813 x 7711
Negative:
-1 x -21691043-11 x -1971913-29 x -747967-97 x -223619-319 x -67997-701 x -30943-1067 x -20329-2813 x -7711
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 21,691,043, 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 | 21,691,043 | |
| -1 | -21,691,043 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,691,043.
Example:
1 x 21,691,043 = 21,691,043
and
-1 x -21,691,043 = 21,691,043
Notice both answers equal 21,691,043
With that explanation out of the way, let's continue. Next, we take the number 21,691,043 and divide it by 2:
21,691,043 ÷ 2 = 10,845,521.5
If the quotient is a whole number, then 2 and 10,845,521.5 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 | 21,691,043 | |
| -1 | -21,691,043 |
Now, we try dividing 21,691,043 by 3:
21,691,043 ÷ 3 = 7,230,347.6667
If the quotient is a whole number, then 3 and 7,230,347.6667 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 | 21,691,043 | |
| -1 | -21,691,043 |
Let's try dividing by 4:
21,691,043 ÷ 4 = 5,422,760.75
If the quotient is a whole number, then 4 and 5,422,760.75 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 | 21,691,043 | |
| -1 | 21,691,043 |
If you did it right, you will end up with this table:
| 1 | 11 | 29 | 97 | 319 | 701 | 1,067 | 2,813 | 7,711 | 20,329 | 30,943 | 67,997 | 223,619 | 747,967 | 1,971,913 | 21,691,043 |
| -1 | -11 | -29 | -97 | -319 | -701 | -1,067 | -2,813 | -7,711 | -20,329 | -30,943 | -67,997 | -223,619 | -747,967 | -1,971,913 | -21,691,043 |
Here are some more numbers to try:
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