A:
Positive:
1 x 206611797 x 295159711 x 187828977 x 268327151 x 1368291057 x 195471661 x 124391777 x 11627
Negative:
-1 x -20661179-7 x -2951597-11 x -1878289-77 x -268327-151 x -136829-1057 x -19547-1661 x -12439-1777 x -11627
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 20,661,179, 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 | 20,661,179 | |
| -1 | -20,661,179 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,661,179.
Example:
1 x 20,661,179 = 20,661,179
and
-1 x -20,661,179 = 20,661,179
Notice both answers equal 20,661,179
With that explanation out of the way, let's continue. Next, we take the number 20,661,179 and divide it by 2:
20,661,179 ÷ 2 = 10,330,589.5
If the quotient is a whole number, then 2 and 10,330,589.5 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 | 20,661,179 | |
| -1 | -20,661,179 |
Now, we try dividing 20,661,179 by 3:
20,661,179 ÷ 3 = 6,887,059.6667
If the quotient is a whole number, then 3 and 6,887,059.6667 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 | 20,661,179 | |
| -1 | -20,661,179 |
Let's try dividing by 4:
20,661,179 ÷ 4 = 5,165,294.75
If the quotient is a whole number, then 4 and 5,165,294.75 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 | 20,661,179 | |
| -1 | 20,661,179 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 151 | 1,057 | 1,661 | 1,777 | 11,627 | 12,439 | 19,547 | 136,829 | 268,327 | 1,878,289 | 2,951,597 | 20,661,179 |
| -1 | -7 | -11 | -77 | -151 | -1,057 | -1,661 | -1,777 | -11,627 | -12,439 | -19,547 | -136,829 | -268,327 | -1,878,289 | -2,951,597 | -20,661,179 |
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