A:
Positive:
1 x 302032155 x 60406437 x 431474535 x 862949727 x 415451187 x 254453635 x 83095089 x 5935
Negative:
-1 x -30203215-5 x -6040643-7 x -4314745-35 x -862949-727 x -41545-1187 x -25445-3635 x -8309-5089 x -5935
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 30,203,215, 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 | 30,203,215 | |
| -1 | -30,203,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,203,215.
Example:
1 x 30,203,215 = 30,203,215
and
-1 x -30,203,215 = 30,203,215
Notice both answers equal 30,203,215
With that explanation out of the way, let's continue. Next, we take the number 30,203,215 and divide it by 2:
30,203,215 ÷ 2 = 15,101,607.5
If the quotient is a whole number, then 2 and 15,101,607.5 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 | 30,203,215 | |
| -1 | -30,203,215 |
Now, we try dividing 30,203,215 by 3:
30,203,215 ÷ 3 = 10,067,738.3333
If the quotient is a whole number, then 3 and 10,067,738.3333 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 | 30,203,215 | |
| -1 | -30,203,215 |
Let's try dividing by 4:
30,203,215 ÷ 4 = 7,550,803.75
If the quotient is a whole number, then 4 and 7,550,803.75 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 | 30,203,215 | |
| -1 | 30,203,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 727 | 1,187 | 3,635 | 5,089 | 5,935 | 8,309 | 25,445 | 41,545 | 862,949 | 4,314,745 | 6,040,643 | 30,203,215 |
| -1 | -5 | -7 | -35 | -727 | -1,187 | -3,635 | -5,089 | -5,935 | -8,309 | -25,445 | -41,545 | -862,949 | -4,314,745 | -6,040,643 | -30,203,215 |
Here are some more numbers to try:
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