A:
Positive:
1 x 201114655 x 402229311 x 182831555 x 365663211 x 953151055 x 190631733 x 116052321 x 8665
Negative:
-1 x -20111465-5 x -4022293-11 x -1828315-55 x -365663-211 x -95315-1055 x -19063-1733 x -11605-2321 x -8665
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 20,111,465, 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 | 20,111,465 | |
| -1 | -20,111,465 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,111,465.
Example:
1 x 20,111,465 = 20,111,465
and
-1 x -20,111,465 = 20,111,465
Notice both answers equal 20,111,465
With that explanation out of the way, let's continue. Next, we take the number 20,111,465 and divide it by 2:
20,111,465 ÷ 2 = 10,055,732.5
If the quotient is a whole number, then 2 and 10,055,732.5 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 | 20,111,465 | |
| -1 | -20,111,465 |
Now, we try dividing 20,111,465 by 3:
20,111,465 ÷ 3 = 6,703,821.6667
If the quotient is a whole number, then 3 and 6,703,821.6667 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 | 20,111,465 | |
| -1 | -20,111,465 |
Let's try dividing by 4:
20,111,465 ÷ 4 = 5,027,866.25
If the quotient is a whole number, then 4 and 5,027,866.25 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 | 20,111,465 | |
| -1 | 20,111,465 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 211 | 1,055 | 1,733 | 2,321 | 8,665 | 11,605 | 19,063 | 95,315 | 365,663 | 1,828,315 | 4,022,293 | 20,111,465 |
| -1 | -5 | -11 | -55 | -211 | -1,055 | -1,733 | -2,321 | -8,665 | -11,605 | -19,063 | -95,315 | -365,663 | -1,828,315 | -4,022,293 | -20,111,465 |
Here are some more numbers to try:
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