A:
Positive:
1 x 2045915311 x 185992313 x 1573781143 x 143071173 x 118261827 x 247391903 x 107512249 x 9097
Negative:
-1 x -20459153-11 x -1859923-13 x -1573781-143 x -143071-173 x -118261-827 x -24739-1903 x -10751-2249 x -9097
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 20,459,153, 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 | 20,459,153 | |
| -1 | -20,459,153 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,459,153.
Example:
1 x 20,459,153 = 20,459,153
and
-1 x -20,459,153 = 20,459,153
Notice both answers equal 20,459,153
With that explanation out of the way, let's continue. Next, we take the number 20,459,153 and divide it by 2:
20,459,153 ÷ 2 = 10,229,576.5
If the quotient is a whole number, then 2 and 10,229,576.5 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 | 20,459,153 | |
| -1 | -20,459,153 |
Now, we try dividing 20,459,153 by 3:
20,459,153 ÷ 3 = 6,819,717.6667
If the quotient is a whole number, then 3 and 6,819,717.6667 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 | 20,459,153 | |
| -1 | -20,459,153 |
Let's try dividing by 4:
20,459,153 ÷ 4 = 5,114,788.25
If the quotient is a whole number, then 4 and 5,114,788.25 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 | 20,459,153 | |
| -1 | 20,459,153 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 173 | 827 | 1,903 | 2,249 | 9,097 | 10,751 | 24,739 | 118,261 | 143,071 | 1,573,781 | 1,859,923 | 20,459,153 |
| -1 | -11 | -13 | -143 | -173 | -827 | -1,903 | -2,249 | -9,097 | -10,751 | -24,739 | -118,261 | -143,071 | -1,573,781 | -1,859,923 | -20,459,153 |
Here are some more numbers to try:
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