A:
Positive:
1 x 16646637 x 23780911 x 15133313 x 12805177 x 2161991 x 18293143 x 116411001 x 1663
Negative:
-1 x -1664663-7 x -237809-11 x -151333-13 x -128051-77 x -21619-91 x -18293-143 x -11641-1001 x -1663
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 1,664,663, 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 | 1,664,663 | |
| -1 | -1,664,663 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,664,663.
Example:
1 x 1,664,663 = 1,664,663
and
-1 x -1,664,663 = 1,664,663
Notice both answers equal 1,664,663
With that explanation out of the way, let's continue. Next, we take the number 1,664,663 and divide it by 2:
1,664,663 ÷ 2 = 832,331.5
If the quotient is a whole number, then 2 and 832,331.5 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 | 1,664,663 | |
| -1 | -1,664,663 |
Now, we try dividing 1,664,663 by 3:
1,664,663 ÷ 3 = 554,887.6667
If the quotient is a whole number, then 3 and 554,887.6667 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 | 1,664,663 | |
| -1 | -1,664,663 |
Let's try dividing by 4:
1,664,663 ÷ 4 = 416,165.75
If the quotient is a whole number, then 4 and 416,165.75 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 | 1,664,663 | |
| -1 | 1,664,663 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 77 | 91 | 143 | 1,001 | 1,663 | 11,641 | 18,293 | 21,619 | 128,051 | 151,333 | 237,809 | 1,664,663 |
| -1 | -7 | -11 | -13 | -77 | -91 | -143 | -1,001 | -1,663 | -11,641 | -18,293 | -21,619 | -128,051 | -151,333 | -237,809 | -1,664,663 |
Here are some more numbers to try:
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