A:
Positive:
1 x 129155397 x 184507713 x 99350371 x 18190991 x 141929497 x 25987923 x 139931999 x 6461
Negative:
-1 x -12915539-7 x -1845077-13 x -993503-71 x -181909-91 x -141929-497 x -25987-923 x -13993-1999 x -6461
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 12,915,539, 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 | 12,915,539 | |
| -1 | -12,915,539 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,915,539.
Example:
1 x 12,915,539 = 12,915,539
and
-1 x -12,915,539 = 12,915,539
Notice both answers equal 12,915,539
With that explanation out of the way, let's continue. Next, we take the number 12,915,539 and divide it by 2:
12,915,539 ÷ 2 = 6,457,769.5
If the quotient is a whole number, then 2 and 6,457,769.5 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 | 12,915,539 | |
| -1 | -12,915,539 |
Now, we try dividing 12,915,539 by 3:
12,915,539 ÷ 3 = 4,305,179.6667
If the quotient is a whole number, then 3 and 4,305,179.6667 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 | 12,915,539 | |
| -1 | -12,915,539 |
Let's try dividing by 4:
12,915,539 ÷ 4 = 3,228,884.75
If the quotient is a whole number, then 4 and 3,228,884.75 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 | 12,915,539 | |
| -1 | 12,915,539 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 71 | 91 | 497 | 923 | 1,999 | 6,461 | 13,993 | 25,987 | 141,929 | 181,909 | 993,503 | 1,845,077 | 12,915,539 |
| -1 | -7 | -13 | -71 | -91 | -497 | -923 | -1,999 | -6,461 | -13,993 | -25,987 | -141,929 | -181,909 | -993,503 | -1,845,077 | -12,915,539 |
Here are some more numbers to try:
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