A:
Positive:
1 x 2068425711 x 188038717 x 121672153 x 390269187 x 110611583 x 35479901 x 229572087 x 9911
Negative:
-1 x -20684257-11 x -1880387-17 x -1216721-53 x -390269-187 x -110611-583 x -35479-901 x -22957-2087 x -9911
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 20,684,257, 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 | 20,684,257 | |
| -1 | -20,684,257 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,684,257.
Example:
1 x 20,684,257 = 20,684,257
and
-1 x -20,684,257 = 20,684,257
Notice both answers equal 20,684,257
With that explanation out of the way, let's continue. Next, we take the number 20,684,257 and divide it by 2:
20,684,257 ÷ 2 = 10,342,128.5
If the quotient is a whole number, then 2 and 10,342,128.5 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 | 20,684,257 | |
| -1 | -20,684,257 |
Now, we try dividing 20,684,257 by 3:
20,684,257 ÷ 3 = 6,894,752.3333
If the quotient is a whole number, then 3 and 6,894,752.3333 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 | 20,684,257 | |
| -1 | -20,684,257 |
Let's try dividing by 4:
20,684,257 ÷ 4 = 5,171,064.25
If the quotient is a whole number, then 4 and 5,171,064.25 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 | 20,684,257 | |
| -1 | 20,684,257 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 53 | 187 | 583 | 901 | 2,087 | 9,911 | 22,957 | 35,479 | 110,611 | 390,269 | 1,216,721 | 1,880,387 | 20,684,257 |
| -1 | -11 | -17 | -53 | -187 | -583 | -901 | -2,087 | -9,911 | -22,957 | -35,479 | -110,611 | -390,269 | -1,216,721 | -1,880,387 | -20,684,257 |
Here are some more numbers to try:
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