A:
Positive:
1 x 385007155 x 770014311 x 350006555 x 700013379 x 1015851847 x 208451895 x 203174169 x 9235
Negative:
-1 x -38500715-5 x -7700143-11 x -3500065-55 x -700013-379 x -101585-1847 x -20845-1895 x -20317-4169 x -9235
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 38,500,715, 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 | 38,500,715 | |
| -1 | -38,500,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 38,500,715.
Example:
1 x 38,500,715 = 38,500,715
and
-1 x -38,500,715 = 38,500,715
Notice both answers equal 38,500,715
With that explanation out of the way, let's continue. Next, we take the number 38,500,715 and divide it by 2:
38,500,715 ÷ 2 = 19,250,357.5
If the quotient is a whole number, then 2 and 19,250,357.5 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 | 38,500,715 | |
| -1 | -38,500,715 |
Now, we try dividing 38,500,715 by 3:
38,500,715 ÷ 3 = 12,833,571.6667
If the quotient is a whole number, then 3 and 12,833,571.6667 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 | 38,500,715 | |
| -1 | -38,500,715 |
Let's try dividing by 4:
38,500,715 ÷ 4 = 9,625,178.75
If the quotient is a whole number, then 4 and 9,625,178.75 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 | 38,500,715 | |
| -1 | 38,500,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 379 | 1,847 | 1,895 | 4,169 | 9,235 | 20,317 | 20,845 | 101,585 | 700,013 | 3,500,065 | 7,700,143 | 38,500,715 |
| -1 | -5 | -11 | -55 | -379 | -1,847 | -1,895 | -4,169 | -9,235 | -20,317 | -20,845 | -101,585 | -700,013 | -3,500,065 | -7,700,143 | -38,500,715 |
Here are some more numbers to try:
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