A:
Positive:
1 x 126640155 x 25328037 x 180914513 x 97415535 x 36182965 x 19483191 x 139165169 x 74935455 x 27833845 x 149871183 x 107052141 x 5915
Negative:
-1 x -12664015-5 x -2532803-7 x -1809145-13 x -974155-35 x -361829-65 x -194831-91 x -139165-169 x -74935-455 x -27833-845 x -14987-1183 x -10705-2141 x -5915
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 12,664,015, 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 | 12,664,015 | |
| -1 | -12,664,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,664,015.
Example:
1 x 12,664,015 = 12,664,015
and
-1 x -12,664,015 = 12,664,015
Notice both answers equal 12,664,015
With that explanation out of the way, let's continue. Next, we take the number 12,664,015 and divide it by 2:
12,664,015 ÷ 2 = 6,332,007.5
If the quotient is a whole number, then 2 and 6,332,007.5 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 | 12,664,015 | |
| -1 | -12,664,015 |
Now, we try dividing 12,664,015 by 3:
12,664,015 ÷ 3 = 4,221,338.3333
If the quotient is a whole number, then 3 and 4,221,338.3333 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 | 12,664,015 | |
| -1 | -12,664,015 |
Let's try dividing by 4:
12,664,015 ÷ 4 = 3,166,003.75
If the quotient is a whole number, then 4 and 3,166,003.75 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 | 12,664,015 | |
| -1 | 12,664,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 169 | 455 | 845 | 1,183 | 2,141 | 5,915 | 10,705 | 14,987 | 27,833 | 74,935 | 139,165 | 194,831 | 361,829 | 974,155 | 1,809,145 | 2,532,803 | 12,664,015 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -169 | -455 | -845 | -1,183 | -2,141 | -5,915 | -10,705 | -14,987 | -27,833 | -74,935 | -139,165 | -194,831 | -361,829 | -974,155 | -1,809,145 | -2,532,803 | -12,664,015 |
Here are some more numbers to try:
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