A:
Positive:
1 x 124670217 x 178100319 x 65615949 x 254429133 x 93737343 x 36347931 x 133911913 x 6517
Negative:
-1 x -12467021-7 x -1781003-19 x -656159-49 x -254429-133 x -93737-343 x -36347-931 x -13391-1913 x -6517
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 12,467,021, 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 | 12,467,021 | |
| -1 | -12,467,021 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,467,021.
Example:
1 x 12,467,021 = 12,467,021
and
-1 x -12,467,021 = 12,467,021
Notice both answers equal 12,467,021
With that explanation out of the way, let's continue. Next, we take the number 12,467,021 and divide it by 2:
12,467,021 ÷ 2 = 6,233,510.5
If the quotient is a whole number, then 2 and 6,233,510.5 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 | 12,467,021 | |
| -1 | -12,467,021 |
Now, we try dividing 12,467,021 by 3:
12,467,021 ÷ 3 = 4,155,673.6667
If the quotient is a whole number, then 3 and 4,155,673.6667 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 | 12,467,021 | |
| -1 | -12,467,021 |
Let's try dividing by 4:
12,467,021 ÷ 4 = 3,116,755.25
If the quotient is a whole number, then 4 and 3,116,755.25 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 | 12,467,021 | |
| -1 | 12,467,021 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 49 | 133 | 343 | 931 | 1,913 | 6,517 | 13,391 | 36,347 | 93,737 | 254,429 | 656,159 | 1,781,003 | 12,467,021 |
| -1 | -7 | -19 | -49 | -133 | -343 | -931 | -1,913 | -6,517 | -13,391 | -36,347 | -93,737 | -254,429 | -656,159 | -1,781,003 | -12,467,021 |
Here are some more numbers to try:
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