A:
Positive:
1 x 211791117 x 12458319 x 11146979 x 2680983 x 25517323 x 65571343 x 15771411 x 1501
Negative:
-1 x -2117911-17 x -124583-19 x -111469-79 x -26809-83 x -25517-323 x -6557-1343 x -1577-1411 x -1501
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 2,117,911, 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 | 2,117,911 | |
| -1 | -2,117,911 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,117,911.
Example:
1 x 2,117,911 = 2,117,911
and
-1 x -2,117,911 = 2,117,911
Notice both answers equal 2,117,911
With that explanation out of the way, let's continue. Next, we take the number 2,117,911 and divide it by 2:
2,117,911 ÷ 2 = 1,058,955.5
If the quotient is a whole number, then 2 and 1,058,955.5 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 | 2,117,911 | |
| -1 | -2,117,911 |
Now, we try dividing 2,117,911 by 3:
2,117,911 ÷ 3 = 705,970.3333
If the quotient is a whole number, then 3 and 705,970.3333 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 | 2,117,911 | |
| -1 | -2,117,911 |
Let's try dividing by 4:
2,117,911 ÷ 4 = 529,477.75
If the quotient is a whole number, then 4 and 529,477.75 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 | 2,117,911 | |
| -1 | 2,117,911 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 79 | 83 | 323 | 1,343 | 1,411 | 1,501 | 1,577 | 6,557 | 25,517 | 26,809 | 111,469 | 124,583 | 2,117,911 |
| -1 | -17 | -19 | -79 | -83 | -323 | -1,343 | -1,411 | -1,501 | -1,577 | -6,557 | -25,517 | -26,809 | -111,469 | -124,583 | -2,117,911 |
Here are some more numbers to try:
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