A:
Positive:
1 x 152451555 x 304903129 x 52569547 x 324365145 x 105139235 x 648731363 x 111852237 x 6815
Negative:
-1 x -15245155-5 x -3049031-29 x -525695-47 x -324365-145 x -105139-235 x -64873-1363 x -11185-2237 x -6815
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 15,245,155, 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 | 15,245,155 | |
| -1 | -15,245,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,245,155.
Example:
1 x 15,245,155 = 15,245,155
and
-1 x -15,245,155 = 15,245,155
Notice both answers equal 15,245,155
With that explanation out of the way, let's continue. Next, we take the number 15,245,155 and divide it by 2:
15,245,155 ÷ 2 = 7,622,577.5
If the quotient is a whole number, then 2 and 7,622,577.5 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 | 15,245,155 | |
| -1 | -15,245,155 |
Now, we try dividing 15,245,155 by 3:
15,245,155 ÷ 3 = 5,081,718.3333
If the quotient is a whole number, then 3 and 5,081,718.3333 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 | 15,245,155 | |
| -1 | -15,245,155 |
Let's try dividing by 4:
15,245,155 ÷ 4 = 3,811,288.75
If the quotient is a whole number, then 4 and 3,811,288.75 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 | 15,245,155 | |
| -1 | 15,245,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 47 | 145 | 235 | 1,363 | 2,237 | 6,815 | 11,185 | 64,873 | 105,139 | 324,365 | 525,695 | 3,049,031 | 15,245,155 |
| -1 | -5 | -29 | -47 | -145 | -235 | -1,363 | -2,237 | -6,815 | -11,185 | -64,873 | -105,139 | -324,365 | -525,695 | -3,049,031 | -15,245,155 |
Here are some more numbers to try:
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