A:
Positive:
1 x 2068167119 x 108850941 x 504431139 x 148789191 x 108281779 x 265492641 x 78313629 x 5699
Negative:
-1 x -20681671-19 x -1088509-41 x -504431-139 x -148789-191 x -108281-779 x -26549-2641 x -7831-3629 x -5699
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 20,681,671, 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 | 20,681,671 | |
| -1 | -20,681,671 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,681,671.
Example:
1 x 20,681,671 = 20,681,671
and
-1 x -20,681,671 = 20,681,671
Notice both answers equal 20,681,671
With that explanation out of the way, let's continue. Next, we take the number 20,681,671 and divide it by 2:
20,681,671 ÷ 2 = 10,340,835.5
If the quotient is a whole number, then 2 and 10,340,835.5 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 | 20,681,671 | |
| -1 | -20,681,671 |
Now, we try dividing 20,681,671 by 3:
20,681,671 ÷ 3 = 6,893,890.3333
If the quotient is a whole number, then 3 and 6,893,890.3333 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 | 20,681,671 | |
| -1 | -20,681,671 |
Let's try dividing by 4:
20,681,671 ÷ 4 = 5,170,417.75
If the quotient is a whole number, then 4 and 5,170,417.75 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 | 20,681,671 | |
| -1 | 20,681,671 |
If you did it right, you will end up with this table:
| 1 | 19 | 41 | 139 | 191 | 779 | 2,641 | 3,629 | 5,699 | 7,831 | 26,549 | 108,281 | 148,789 | 504,431 | 1,088,509 | 20,681,671 |
| -1 | -19 | -41 | -139 | -191 | -779 | -2,641 | -3,629 | -5,699 | -7,831 | -26,549 | -108,281 | -148,789 | -504,431 | -1,088,509 | -20,681,671 |
Here are some more numbers to try:
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