A:
Positive:
1 x 200658855 x 40131777 x 286655535 x 573311167 x 120155835 x 240311169 x 171653433 x 5845
Negative:
-1 x -20065885-5 x -4013177-7 x -2866555-35 x -573311-167 x -120155-835 x -24031-1169 x -17165-3433 x -5845
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 20,065,885, 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 | 20,065,885 | |
| -1 | -20,065,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,065,885.
Example:
1 x 20,065,885 = 20,065,885
and
-1 x -20,065,885 = 20,065,885
Notice both answers equal 20,065,885
With that explanation out of the way, let's continue. Next, we take the number 20,065,885 and divide it by 2:
20,065,885 ÷ 2 = 10,032,942.5
If the quotient is a whole number, then 2 and 10,032,942.5 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 | 20,065,885 | |
| -1 | -20,065,885 |
Now, we try dividing 20,065,885 by 3:
20,065,885 ÷ 3 = 6,688,628.3333
If the quotient is a whole number, then 3 and 6,688,628.3333 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 | 20,065,885 | |
| -1 | -20,065,885 |
Let's try dividing by 4:
20,065,885 ÷ 4 = 5,016,471.25
If the quotient is a whole number, then 4 and 5,016,471.25 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 | 20,065,885 | |
| -1 | 20,065,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 167 | 835 | 1,169 | 3,433 | 5,845 | 17,165 | 24,031 | 120,155 | 573,311 | 2,866,555 | 4,013,177 | 20,065,885 |
| -1 | -5 | -7 | -35 | -167 | -835 | -1,169 | -3,433 | -5,845 | -17,165 | -24,031 | -120,155 | -573,311 | -2,866,555 | -4,013,177 | -20,065,885 |
Here are some more numbers to try:
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