A:
Positive:
1 x 155027155 x 310054341 x 37811547 x 329845205 x 75623235 x 659691609 x 96351927 x 8045
Negative:
-1 x -15502715-5 x -3100543-41 x -378115-47 x -329845-205 x -75623-235 x -65969-1609 x -9635-1927 x -8045
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 15,502,715, 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 | 15,502,715 | |
| -1 | -15,502,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,502,715.
Example:
1 x 15,502,715 = 15,502,715
and
-1 x -15,502,715 = 15,502,715
Notice both answers equal 15,502,715
With that explanation out of the way, let's continue. Next, we take the number 15,502,715 and divide it by 2:
15,502,715 ÷ 2 = 7,751,357.5
If the quotient is a whole number, then 2 and 7,751,357.5 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 | 15,502,715 | |
| -1 | -15,502,715 |
Now, we try dividing 15,502,715 by 3:
15,502,715 ÷ 3 = 5,167,571.6667
If the quotient is a whole number, then 3 and 5,167,571.6667 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 | 15,502,715 | |
| -1 | -15,502,715 |
Let's try dividing by 4:
15,502,715 ÷ 4 = 3,875,678.75
If the quotient is a whole number, then 4 and 3,875,678.75 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 | 15,502,715 | |
| -1 | 15,502,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 47 | 205 | 235 | 1,609 | 1,927 | 8,045 | 9,635 | 65,969 | 75,623 | 329,845 | 378,115 | 3,100,543 | 15,502,715 |
| -1 | -5 | -41 | -47 | -205 | -235 | -1,609 | -1,927 | -8,045 | -9,635 | -65,969 | -75,623 | -329,845 | -378,115 | -3,100,543 | -15,502,715 |
Here are some more numbers to try:
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