A:
Positive:
1 x 208694055 x 417388143 x 485335113 x 184685215 x 97067565 x 36937859 x 242954295 x 4859
Negative:
-1 x -20869405-5 x -4173881-43 x -485335-113 x -184685-215 x -97067-565 x -36937-859 x -24295-4295 x -4859
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 20,869,405, 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 | 20,869,405 | |
| -1 | -20,869,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,869,405.
Example:
1 x 20,869,405 = 20,869,405
and
-1 x -20,869,405 = 20,869,405
Notice both answers equal 20,869,405
With that explanation out of the way, let's continue. Next, we take the number 20,869,405 and divide it by 2:
20,869,405 ÷ 2 = 10,434,702.5
If the quotient is a whole number, then 2 and 10,434,702.5 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 | 20,869,405 | |
| -1 | -20,869,405 |
Now, we try dividing 20,869,405 by 3:
20,869,405 ÷ 3 = 6,956,468.3333
If the quotient is a whole number, then 3 and 6,956,468.3333 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 | 20,869,405 | |
| -1 | -20,869,405 |
Let's try dividing by 4:
20,869,405 ÷ 4 = 5,217,351.25
If the quotient is a whole number, then 4 and 5,217,351.25 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 | 20,869,405 | |
| -1 | 20,869,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 113 | 215 | 565 | 859 | 4,295 | 4,859 | 24,295 | 36,937 | 97,067 | 184,685 | 485,335 | 4,173,881 | 20,869,405 |
| -1 | -5 | -43 | -113 | -215 | -565 | -859 | -4,295 | -4,859 | -24,295 | -36,937 | -97,067 | -184,685 | -485,335 | -4,173,881 | -20,869,405 |
Here are some more numbers to try:
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