A:
Positive:
1 x 207041455 x 41408297 x 295773511 x 188219535 x 59154755 x 37643977 x 268885385 x 53777
Negative:
-1 x -20704145-5 x -4140829-7 x -2957735-11 x -1882195-35 x -591547-55 x -376439-77 x -268885-385 x -53777
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 20,704,145, 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 | 20,704,145 | |
| -1 | -20,704,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,704,145.
Example:
1 x 20,704,145 = 20,704,145
and
-1 x -20,704,145 = 20,704,145
Notice both answers equal 20,704,145
With that explanation out of the way, let's continue. Next, we take the number 20,704,145 and divide it by 2:
20,704,145 ÷ 2 = 10,352,072.5
If the quotient is a whole number, then 2 and 10,352,072.5 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 | 20,704,145 | |
| -1 | -20,704,145 |
Now, we try dividing 20,704,145 by 3:
20,704,145 ÷ 3 = 6,901,381.6667
If the quotient is a whole number, then 3 and 6,901,381.6667 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 | 20,704,145 | |
| -1 | -20,704,145 |
Let's try dividing by 4:
20,704,145 ÷ 4 = 5,176,036.25
If the quotient is a whole number, then 4 and 5,176,036.25 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 | 20,704,145 | |
| -1 | 20,704,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 53,777 | 268,885 | 376,439 | 591,547 | 1,882,195 | 2,957,735 | 4,140,829 | 20,704,145 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -53,777 | -268,885 | -376,439 | -591,547 | -1,882,195 | -2,957,735 | -4,140,829 | -20,704,145 |
Here are some more numbers to try:
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