A:
Positive:
1 x 1588618911 x 144419979 x 201091101 x 157289181 x 87769869 x 182811111 x 142991991 x 7979
Negative:
-1 x -15886189-11 x -1444199-79 x -201091-101 x -157289-181 x -87769-869 x -18281-1111 x -14299-1991 x -7979
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 15,886,189, 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 | 15,886,189 | |
| -1 | -15,886,189 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,886,189.
Example:
1 x 15,886,189 = 15,886,189
and
-1 x -15,886,189 = 15,886,189
Notice both answers equal 15,886,189
With that explanation out of the way, let's continue. Next, we take the number 15,886,189 and divide it by 2:
15,886,189 ÷ 2 = 7,943,094.5
If the quotient is a whole number, then 2 and 7,943,094.5 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 | 15,886,189 | |
| -1 | -15,886,189 |
Now, we try dividing 15,886,189 by 3:
15,886,189 ÷ 3 = 5,295,396.3333
If the quotient is a whole number, then 3 and 5,295,396.3333 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 | 15,886,189 | |
| -1 | -15,886,189 |
Let's try dividing by 4:
15,886,189 ÷ 4 = 3,971,547.25
If the quotient is a whole number, then 4 and 3,971,547.25 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 | 15,886,189 | |
| -1 | 15,886,189 |
If you did it right, you will end up with this table:
| 1 | 11 | 79 | 101 | 181 | 869 | 1,111 | 1,991 | 7,979 | 14,299 | 18,281 | 87,769 | 157,289 | 201,091 | 1,444,199 | 15,886,189 |
| -1 | -11 | -79 | -101 | -181 | -869 | -1,111 | -1,991 | -7,979 | -14,299 | -18,281 | -87,769 | -157,289 | -201,091 | -1,444,199 | -15,886,189 |
Here are some more numbers to try:
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