A:
Positive:
1 x 200287555 x 400575119 x 105414543 x 46578595 x 210829215 x 93157817 x 245154085 x 4903
Negative:
-1 x -20028755-5 x -4005751-19 x -1054145-43 x -465785-95 x -210829-215 x -93157-817 x -24515-4085 x -4903
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 20,028,755, 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 | 20,028,755 | |
| -1 | -20,028,755 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,028,755.
Example:
1 x 20,028,755 = 20,028,755
and
-1 x -20,028,755 = 20,028,755
Notice both answers equal 20,028,755
With that explanation out of the way, let's continue. Next, we take the number 20,028,755 and divide it by 2:
20,028,755 ÷ 2 = 10,014,377.5
If the quotient is a whole number, then 2 and 10,014,377.5 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 | 20,028,755 | |
| -1 | -20,028,755 |
Now, we try dividing 20,028,755 by 3:
20,028,755 ÷ 3 = 6,676,251.6667
If the quotient is a whole number, then 3 and 6,676,251.6667 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 | 20,028,755 | |
| -1 | -20,028,755 |
Let's try dividing by 4:
20,028,755 ÷ 4 = 5,007,188.75
If the quotient is a whole number, then 4 and 5,007,188.75 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 | 20,028,755 | |
| -1 | 20,028,755 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 43 | 95 | 215 | 817 | 4,085 | 4,903 | 24,515 | 93,157 | 210,829 | 465,785 | 1,054,145 | 4,005,751 | 20,028,755 |
| -1 | -5 | -19 | -43 | -95 | -215 | -817 | -4,085 | -4,903 | -24,515 | -93,157 | -210,829 | -465,785 | -1,054,145 | -4,005,751 | -20,028,755 |
Here are some more numbers to try:
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