A:
Positive:
1 x 1243205155 x 2486410311 x 1130186519 x 654318555 x 226037395 x 1308637209 x 5948351045 x 118967
Negative:
-1 x -124320515-5 x -24864103-11 x -11301865-19 x -6543185-55 x -2260373-95 x -1308637-209 x -594835-1045 x -118967
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 124,320,515, 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 | 124,320,515 | |
| -1 | -124,320,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 124,320,515.
Example:
1 x 124,320,515 = 124,320,515
and
-1 x -124,320,515 = 124,320,515
Notice both answers equal 124,320,515
With that explanation out of the way, let's continue. Next, we take the number 124,320,515 and divide it by 2:
124,320,515 ÷ 2 = 62,160,257.5
If the quotient is a whole number, then 2 and 62,160,257.5 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 | 124,320,515 | |
| -1 | -124,320,515 |
Now, we try dividing 124,320,515 by 3:
124,320,515 ÷ 3 = 41,440,171.6667
If the quotient is a whole number, then 3 and 41,440,171.6667 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 | 124,320,515 | |
| -1 | -124,320,515 |
Let's try dividing by 4:
124,320,515 ÷ 4 = 31,080,128.75
If the quotient is a whole number, then 4 and 31,080,128.75 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 | 124,320,515 | |
| -1 | 124,320,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 19 | 55 | 95 | 209 | 1,045 | 118,967 | 594,835 | 1,308,637 | 2,260,373 | 6,543,185 | 11,301,865 | 24,864,103 | 124,320,515 |
| -1 | -5 | -11 | -19 | -55 | -95 | -209 | -1,045 | -118,967 | -594,835 | -1,308,637 | -2,260,373 | -6,543,185 | -11,301,865 | -24,864,103 | -124,320,515 |
Here are some more numbers to try:
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