A:
Positive:
1 x 1237360155 x 2474720313 x 951815565 x 1903631311 x 3978651555 x 795734043 x 306056121 x 20215
Negative:
-1 x -123736015-5 x -24747203-13 x -9518155-65 x -1903631-311 x -397865-1555 x -79573-4043 x -30605-6121 x -20215
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 123,736,015, 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 | 123,736,015 | |
| -1 | -123,736,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 123,736,015.
Example:
1 x 123,736,015 = 123,736,015
and
-1 x -123,736,015 = 123,736,015
Notice both answers equal 123,736,015
With that explanation out of the way, let's continue. Next, we take the number 123,736,015 and divide it by 2:
123,736,015 ÷ 2 = 61,868,007.5
If the quotient is a whole number, then 2 and 61,868,007.5 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 | 123,736,015 | |
| -1 | -123,736,015 |
Now, we try dividing 123,736,015 by 3:
123,736,015 ÷ 3 = 41,245,338.3333
If the quotient is a whole number, then 3 and 41,245,338.3333 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 | 123,736,015 | |
| -1 | -123,736,015 |
Let's try dividing by 4:
123,736,015 ÷ 4 = 30,934,003.75
If the quotient is a whole number, then 4 and 30,934,003.75 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 | 123,736,015 | |
| -1 | 123,736,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 311 | 1,555 | 4,043 | 6,121 | 20,215 | 30,605 | 79,573 | 397,865 | 1,903,631 | 9,518,155 | 24,747,203 | 123,736,015 |
| -1 | -5 | -13 | -65 | -311 | -1,555 | -4,043 | -6,121 | -20,215 | -30,605 | -79,573 | -397,865 | -1,903,631 | -9,518,155 | -24,747,203 | -123,736,015 |
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