A:
Positive:
1 x 1392307155 x 2784614313 x 1071005565 x 21420111151 x 1209651861 x 748155755 x 241939305 x 14963
Negative:
-1 x -139230715-5 x -27846143-13 x -10710055-65 x -2142011-1151 x -120965-1861 x -74815-5755 x -24193-9305 x -14963
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 139,230,715, 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 | 139,230,715 | |
| -1 | -139,230,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 139,230,715.
Example:
1 x 139,230,715 = 139,230,715
and
-1 x -139,230,715 = 139,230,715
Notice both answers equal 139,230,715
With that explanation out of the way, let's continue. Next, we take the number 139,230,715 and divide it by 2:
139,230,715 ÷ 2 = 69,615,357.5
If the quotient is a whole number, then 2 and 69,615,357.5 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 | 139,230,715 | |
| -1 | -139,230,715 |
Now, we try dividing 139,230,715 by 3:
139,230,715 ÷ 3 = 46,410,238.3333
If the quotient is a whole number, then 3 and 46,410,238.3333 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 | 139,230,715 | |
| -1 | -139,230,715 |
Let's try dividing by 4:
139,230,715 ÷ 4 = 34,807,678.75
If the quotient is a whole number, then 4 and 34,807,678.75 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 | 139,230,715 | |
| -1 | 139,230,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 1,151 | 1,861 | 5,755 | 9,305 | 14,963 | 24,193 | 74,815 | 120,965 | 2,142,011 | 10,710,055 | 27,846,143 | 139,230,715 |
| -1 | -5 | -13 | -65 | -1,151 | -1,861 | -5,755 | -9,305 | -14,963 | -24,193 | -74,815 | -120,965 | -2,142,011 | -10,710,055 | -27,846,143 | -139,230,715 |
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