A:
Positive:
1 x 204235155 x 40847037 x 291764535 x 583529173 x 118055865 x 236111211 x 168653373 x 6055
Negative:
-1 x -20423515-5 x -4084703-7 x -2917645-35 x -583529-173 x -118055-865 x -23611-1211 x -16865-3373 x -6055
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 20,423,515, 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 | 20,423,515 | |
| -1 | -20,423,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,423,515.
Example:
1 x 20,423,515 = 20,423,515
and
-1 x -20,423,515 = 20,423,515
Notice both answers equal 20,423,515
With that explanation out of the way, let's continue. Next, we take the number 20,423,515 and divide it by 2:
20,423,515 ÷ 2 = 10,211,757.5
If the quotient is a whole number, then 2 and 10,211,757.5 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 | 20,423,515 | |
| -1 | -20,423,515 |
Now, we try dividing 20,423,515 by 3:
20,423,515 ÷ 3 = 6,807,838.3333
If the quotient is a whole number, then 3 and 6,807,838.3333 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 | 20,423,515 | |
| -1 | -20,423,515 |
Let's try dividing by 4:
20,423,515 ÷ 4 = 5,105,878.75
If the quotient is a whole number, then 4 and 5,105,878.75 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 | 20,423,515 | |
| -1 | 20,423,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 173 | 865 | 1,211 | 3,373 | 6,055 | 16,865 | 23,611 | 118,055 | 583,529 | 2,917,645 | 4,084,703 | 20,423,515 |
| -1 | -5 | -7 | -35 | -173 | -865 | -1,211 | -3,373 | -6,055 | -16,865 | -23,611 | -118,055 | -583,529 | -2,917,645 | -4,084,703 | -20,423,515 |
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