A:
Positive:
1 x 211981119 x 11156931 x 6838159 x 3592961 x 34751589 x 35991121 x 18911159 x 1829
Negative:
-1 x -2119811-19 x -111569-31 x -68381-59 x -35929-61 x -34751-589 x -3599-1121 x -1891-1159 x -1829
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 2,119,811, 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 | 2,119,811 | |
| -1 | -2,119,811 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,119,811.
Example:
1 x 2,119,811 = 2,119,811
and
-1 x -2,119,811 = 2,119,811
Notice both answers equal 2,119,811
With that explanation out of the way, let's continue. Next, we take the number 2,119,811 and divide it by 2:
2,119,811 ÷ 2 = 1,059,905.5
If the quotient is a whole number, then 2 and 1,059,905.5 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 | 2,119,811 | |
| -1 | -2,119,811 |
Now, we try dividing 2,119,811 by 3:
2,119,811 ÷ 3 = 706,603.6667
If the quotient is a whole number, then 3 and 706,603.6667 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 | 2,119,811 | |
| -1 | -2,119,811 |
Let's try dividing by 4:
2,119,811 ÷ 4 = 529,952.75
If the quotient is a whole number, then 4 and 529,952.75 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 | 2,119,811 | |
| -1 | 2,119,811 |
If you did it right, you will end up with this table:
| 1 | 19 | 31 | 59 | 61 | 589 | 1,121 | 1,159 | 1,829 | 1,891 | 3,599 | 34,751 | 35,929 | 68,381 | 111,569 | 2,119,811 |
| -1 | -19 | -31 | -59 | -61 | -589 | -1,121 | -1,159 | -1,829 | -1,891 | -3,599 | -34,751 | -35,929 | -68,381 | -111,569 | -2,119,811 |
Here are some more numbers to try:
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