A:
Positive:
1 x 1230041455 x 2460082911 x 1118219555 x 2236439103 x 1194215515 x 2388431133 x 1085655665 x 21713
Negative:
-1 x -123004145-5 x -24600829-11 x -11182195-55 x -2236439-103 x -1194215-515 x -238843-1133 x -108565-5665 x -21713
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 123,004,145, 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 | 123,004,145 | |
| -1 | -123,004,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,004,145.
Example:
1 x 123,004,145 = 123,004,145
and
-1 x -123,004,145 = 123,004,145
Notice both answers equal 123,004,145
With that explanation out of the way, let's continue. Next, we take the number 123,004,145 and divide it by 2:
123,004,145 ÷ 2 = 61,502,072.5
If the quotient is a whole number, then 2 and 61,502,072.5 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 | 123,004,145 | |
| -1 | -123,004,145 |
Now, we try dividing 123,004,145 by 3:
123,004,145 ÷ 3 = 41,001,381.6667
If the quotient is a whole number, then 3 and 41,001,381.6667 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 | 123,004,145 | |
| -1 | -123,004,145 |
Let's try dividing by 4:
123,004,145 ÷ 4 = 30,751,036.25
If the quotient is a whole number, then 4 and 30,751,036.25 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 | 123,004,145 | |
| -1 | 123,004,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 103 | 515 | 1,133 | 5,665 | 21,713 | 108,565 | 238,843 | 1,194,215 | 2,236,439 | 11,182,195 | 24,600,829 | 123,004,145 |
| -1 | -5 | -11 | -55 | -103 | -515 | -1,133 | -5,665 | -21,713 | -108,565 | -238,843 | -1,194,215 | -2,236,439 | -11,182,195 | -24,600,829 | -123,004,145 |
Here are some more numbers to try:
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