A:
Positive:
1 x 300002155 x 60000437 x 428574535 x 857149547 x 548451567 x 191452735 x 109693829 x 7835
Negative:
-1 x -30000215-5 x -6000043-7 x -4285745-35 x -857149-547 x -54845-1567 x -19145-2735 x -10969-3829 x -7835
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 30,000,215, 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 | 30,000,215 | |
| -1 | -30,000,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,000,215.
Example:
1 x 30,000,215 = 30,000,215
and
-1 x -30,000,215 = 30,000,215
Notice both answers equal 30,000,215
With that explanation out of the way, let's continue. Next, we take the number 30,000,215 and divide it by 2:
30,000,215 ÷ 2 = 15,000,107.5
If the quotient is a whole number, then 2 and 15,000,107.5 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 | 30,000,215 | |
| -1 | -30,000,215 |
Now, we try dividing 30,000,215 by 3:
30,000,215 ÷ 3 = 10,000,071.6667
If the quotient is a whole number, then 3 and 10,000,071.6667 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 | 30,000,215 | |
| -1 | -30,000,215 |
Let's try dividing by 4:
30,000,215 ÷ 4 = 7,500,053.75
If the quotient is a whole number, then 4 and 7,500,053.75 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 | 30,000,215 | |
| -1 | 30,000,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 547 | 1,567 | 2,735 | 3,829 | 7,835 | 10,969 | 19,145 | 54,845 | 857,149 | 4,285,745 | 6,000,043 | 30,000,215 |
| -1 | -5 | -7 | -35 | -547 | -1,567 | -2,735 | -3,829 | -7,835 | -10,969 | -19,145 | -54,845 | -857,149 | -4,285,745 | -6,000,043 | -30,000,215 |
Here are some more numbers to try:
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