A:
Positive:
1 x 131915155 x 263830359 x 22358597 x 135995295 x 44717461 x 28615485 x 271992305 x 5723
Negative:
-1 x -13191515-5 x -2638303-59 x -223585-97 x -135995-295 x -44717-461 x -28615-485 x -27199-2305 x -5723
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 13,191,515, 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 | 13,191,515 | |
| -1 | -13,191,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,191,515.
Example:
1 x 13,191,515 = 13,191,515
and
-1 x -13,191,515 = 13,191,515
Notice both answers equal 13,191,515
With that explanation out of the way, let's continue. Next, we take the number 13,191,515 and divide it by 2:
13,191,515 ÷ 2 = 6,595,757.5
If the quotient is a whole number, then 2 and 6,595,757.5 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 | 13,191,515 | |
| -1 | -13,191,515 |
Now, we try dividing 13,191,515 by 3:
13,191,515 ÷ 3 = 4,397,171.6667
If the quotient is a whole number, then 3 and 4,397,171.6667 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 | 13,191,515 | |
| -1 | -13,191,515 |
Let's try dividing by 4:
13,191,515 ÷ 4 = 3,297,878.75
If the quotient is a whole number, then 4 and 3,297,878.75 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 | 13,191,515 | |
| -1 | 13,191,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 59 | 97 | 295 | 461 | 485 | 2,305 | 5,723 | 27,199 | 28,615 | 44,717 | 135,995 | 223,585 | 2,638,303 | 13,191,515 |
| -1 | -5 | -59 | -97 | -295 | -461 | -485 | -2,305 | -5,723 | -27,199 | -28,615 | -44,717 | -135,995 | -223,585 | -2,638,303 | -13,191,515 |
Here are some more numbers to try:
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