A:
Positive:
1 x 213433997 x 304905711 x 194030977 x 277187109 x 195811763 x 279731199 x 178012543 x 8393
Negative:
-1 x -21343399-7 x -3049057-11 x -1940309-77 x -277187-109 x -195811-763 x -27973-1199 x -17801-2543 x -8393
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 21,343,399, 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 | 21,343,399 | |
| -1 | -21,343,399 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,343,399.
Example:
1 x 21,343,399 = 21,343,399
and
-1 x -21,343,399 = 21,343,399
Notice both answers equal 21,343,399
With that explanation out of the way, let's continue. Next, we take the number 21,343,399 and divide it by 2:
21,343,399 ÷ 2 = 10,671,699.5
If the quotient is a whole number, then 2 and 10,671,699.5 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 | 21,343,399 | |
| -1 | -21,343,399 |
Now, we try dividing 21,343,399 by 3:
21,343,399 ÷ 3 = 7,114,466.3333
If the quotient is a whole number, then 3 and 7,114,466.3333 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 | 21,343,399 | |
| -1 | -21,343,399 |
Let's try dividing by 4:
21,343,399 ÷ 4 = 5,335,849.75
If the quotient is a whole number, then 4 and 5,335,849.75 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 | 21,343,399 | |
| -1 | 21,343,399 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 109 | 763 | 1,199 | 2,543 | 8,393 | 17,801 | 27,973 | 195,811 | 277,187 | 1,940,309 | 3,049,057 | 21,343,399 |
| -1 | -7 | -11 | -77 | -109 | -763 | -1,199 | -2,543 | -8,393 | -17,801 | -27,973 | -195,811 | -277,187 | -1,940,309 | -3,049,057 | -21,343,399 |
Here are some more numbers to try:
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