A:
Positive:
1 x 2078624329 x 71676743 x 48340179 x 263117211 x 985131247 x 166692291 x 90733397 x 6119
Negative:
-1 x -20786243-29 x -716767-43 x -483401-79 x -263117-211 x -98513-1247 x -16669-2291 x -9073-3397 x -6119
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 20,786,243, 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 | 20,786,243 | |
| -1 | -20,786,243 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,786,243.
Example:
1 x 20,786,243 = 20,786,243
and
-1 x -20,786,243 = 20,786,243
Notice both answers equal 20,786,243
With that explanation out of the way, let's continue. Next, we take the number 20,786,243 and divide it by 2:
20,786,243 ÷ 2 = 10,393,121.5
If the quotient is a whole number, then 2 and 10,393,121.5 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 | 20,786,243 | |
| -1 | -20,786,243 |
Now, we try dividing 20,786,243 by 3:
20,786,243 ÷ 3 = 6,928,747.6667
If the quotient is a whole number, then 3 and 6,928,747.6667 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 | 20,786,243 | |
| -1 | -20,786,243 |
Let's try dividing by 4:
20,786,243 ÷ 4 = 5,196,560.75
If the quotient is a whole number, then 4 and 5,196,560.75 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 | 20,786,243 | |
| -1 | 20,786,243 |
If you did it right, you will end up with this table:
| 1 | 29 | 43 | 79 | 211 | 1,247 | 2,291 | 3,397 | 6,119 | 9,073 | 16,669 | 98,513 | 263,117 | 483,401 | 716,767 | 20,786,243 |
| -1 | -29 | -43 | -79 | -211 | -1,247 | -2,291 | -3,397 | -6,119 | -9,073 | -16,669 | -98,513 | -263,117 | -483,401 | -716,767 | -20,786,243 |
Here are some more numbers to try:
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