A:
Positive:
1 x 211651713 x 16280917 x 12450161 x 34697157 x 13481221 x 9577793 x 26691037 x 2041
Negative:
-1 x -2116517-13 x -162809-17 x -124501-61 x -34697-157 x -13481-221 x -9577-793 x -2669-1037 x -2041
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 2,116,517, 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 | 2,116,517 | |
| -1 | -2,116,517 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,116,517.
Example:
1 x 2,116,517 = 2,116,517
and
-1 x -2,116,517 = 2,116,517
Notice both answers equal 2,116,517
With that explanation out of the way, let's continue. Next, we take the number 2,116,517 and divide it by 2:
2,116,517 ÷ 2 = 1,058,258.5
If the quotient is a whole number, then 2 and 1,058,258.5 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 | 2,116,517 | |
| -1 | -2,116,517 |
Now, we try dividing 2,116,517 by 3:
2,116,517 ÷ 3 = 705,505.6667
If the quotient is a whole number, then 3 and 705,505.6667 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 | 2,116,517 | |
| -1 | -2,116,517 |
Let's try dividing by 4:
2,116,517 ÷ 4 = 529,129.25
If the quotient is a whole number, then 4 and 529,129.25 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 | 2,116,517 | |
| -1 | 2,116,517 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 61 | 157 | 221 | 793 | 1,037 | 2,041 | 2,669 | 9,577 | 13,481 | 34,697 | 124,501 | 162,809 | 2,116,517 |
| -1 | -13 | -17 | -61 | -157 | -221 | -793 | -1,037 | -2,041 | -2,669 | -9,577 | -13,481 | -34,697 | -124,501 | -162,809 | -2,116,517 |
Here are some more numbers to try:
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