A:
Positive:
1 x 127876077 x 182680137 x 34561197 x 131831259 x 49373509 x 25123679 x 188333563 x 3589
Negative:
-1 x -12787607-7 x -1826801-37 x -345611-97 x -131831-259 x -49373-509 x -25123-679 x -18833-3563 x -3589
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 12,787,607, 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 | 12,787,607 | |
| -1 | -12,787,607 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,787,607.
Example:
1 x 12,787,607 = 12,787,607
and
-1 x -12,787,607 = 12,787,607
Notice both answers equal 12,787,607
With that explanation out of the way, let's continue. Next, we take the number 12,787,607 and divide it by 2:
12,787,607 ÷ 2 = 6,393,803.5
If the quotient is a whole number, then 2 and 6,393,803.5 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 | 12,787,607 | |
| -1 | -12,787,607 |
Now, we try dividing 12,787,607 by 3:
12,787,607 ÷ 3 = 4,262,535.6667
If the quotient is a whole number, then 3 and 4,262,535.6667 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 | 12,787,607 | |
| -1 | -12,787,607 |
Let's try dividing by 4:
12,787,607 ÷ 4 = 3,196,901.75
If the quotient is a whole number, then 4 and 3,196,901.75 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 | 12,787,607 | |
| -1 | 12,787,607 |
If you did it right, you will end up with this table:
| 1 | 7 | 37 | 97 | 259 | 509 | 679 | 3,563 | 3,589 | 18,833 | 25,123 | 49,373 | 131,831 | 345,611 | 1,826,801 | 12,787,607 |
| -1 | -7 | -37 | -97 | -259 | -509 | -679 | -3,563 | -3,589 | -18,833 | -25,123 | -49,373 | -131,831 | -345,611 | -1,826,801 | -12,787,607 |
Here are some more numbers to try:
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