A:
Positive:
1 x 125113455 x 25022697 x 178733511 x 113739535 x 35746755 x 22747977 x 162485385 x 32497
Negative:
-1 x -12511345-5 x -2502269-7 x -1787335-11 x -1137395-35 x -357467-55 x -227479-77 x -162485-385 x -32497
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 12,511,345, 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 | 12,511,345 | |
| -1 | -12,511,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,511,345.
Example:
1 x 12,511,345 = 12,511,345
and
-1 x -12,511,345 = 12,511,345
Notice both answers equal 12,511,345
With that explanation out of the way, let's continue. Next, we take the number 12,511,345 and divide it by 2:
12,511,345 ÷ 2 = 6,255,672.5
If the quotient is a whole number, then 2 and 6,255,672.5 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 | 12,511,345 | |
| -1 | -12,511,345 |
Now, we try dividing 12,511,345 by 3:
12,511,345 ÷ 3 = 4,170,448.3333
If the quotient is a whole number, then 3 and 4,170,448.3333 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 | 12,511,345 | |
| -1 | -12,511,345 |
Let's try dividing by 4:
12,511,345 ÷ 4 = 3,127,836.25
If the quotient is a whole number, then 4 and 3,127,836.25 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 | 12,511,345 | |
| -1 | 12,511,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 32,497 | 162,485 | 227,479 | 357,467 | 1,137,395 | 1,787,335 | 2,502,269 | 12,511,345 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -32,497 | -162,485 | -227,479 | -357,467 | -1,137,395 | -1,787,335 | -2,502,269 | -12,511,345 |
Here are some more numbers to try:
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