A:
Positive:
1 x 2389398713 x 183799923 x 1038869157 x 152191299 x 79913509 x 469432041 x 117073611 x 6617
Negative:
-1 x -23893987-13 x -1837999-23 x -1038869-157 x -152191-299 x -79913-509 x -46943-2041 x -11707-3611 x -6617
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 23,893,987, 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 | 23,893,987 | |
| -1 | -23,893,987 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 23,893,987.
Example:
1 x 23,893,987 = 23,893,987
and
-1 x -23,893,987 = 23,893,987
Notice both answers equal 23,893,987
With that explanation out of the way, let's continue. Next, we take the number 23,893,987 and divide it by 2:
23,893,987 ÷ 2 = 11,946,993.5
If the quotient is a whole number, then 2 and 11,946,993.5 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 | 23,893,987 | |
| -1 | -23,893,987 |
Now, we try dividing 23,893,987 by 3:
23,893,987 ÷ 3 = 7,964,662.3333
If the quotient is a whole number, then 3 and 7,964,662.3333 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 | 23,893,987 | |
| -1 | -23,893,987 |
Let's try dividing by 4:
23,893,987 ÷ 4 = 5,973,496.75
If the quotient is a whole number, then 4 and 5,973,496.75 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 | 23,893,987 | |
| -1 | 23,893,987 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 157 | 299 | 509 | 2,041 | 3,611 | 6,617 | 11,707 | 46,943 | 79,913 | 152,191 | 1,038,869 | 1,837,999 | 23,893,987 |
| -1 | -13 | -23 | -157 | -299 | -509 | -2,041 | -3,611 | -6,617 | -11,707 | -46,943 | -79,913 | -152,191 | -1,038,869 | -1,837,999 | -23,893,987 |
Here are some more numbers to try:
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