A:
Positive:
1 x 3015514711 x 274137719 x 1587113157 x 192071209 x 144283919 x 328131727 x 174612983 x 10109
Negative:
-1 x -30155147-11 x -2741377-19 x -1587113-157 x -192071-209 x -144283-919 x -32813-1727 x -17461-2983 x -10109
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 30,155,147, 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 | 30,155,147 | |
| -1 | -30,155,147 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,155,147.
Example:
1 x 30,155,147 = 30,155,147
and
-1 x -30,155,147 = 30,155,147
Notice both answers equal 30,155,147
With that explanation out of the way, let's continue. Next, we take the number 30,155,147 and divide it by 2:
30,155,147 ÷ 2 = 15,077,573.5
If the quotient is a whole number, then 2 and 15,077,573.5 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 | 30,155,147 | |
| -1 | -30,155,147 |
Now, we try dividing 30,155,147 by 3:
30,155,147 ÷ 3 = 10,051,715.6667
If the quotient is a whole number, then 3 and 10,051,715.6667 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 | 30,155,147 | |
| -1 | -30,155,147 |
Let's try dividing by 4:
30,155,147 ÷ 4 = 7,538,786.75
If the quotient is a whole number, then 4 and 7,538,786.75 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 | 30,155,147 | |
| -1 | 30,155,147 |
If you did it right, you will end up with this table:
| 1 | 11 | 19 | 157 | 209 | 919 | 1,727 | 2,983 | 10,109 | 17,461 | 32,813 | 144,283 | 192,071 | 1,587,113 | 2,741,377 | 30,155,147 |
| -1 | -11 | -19 | -157 | -209 | -919 | -1,727 | -2,983 | -10,109 | -17,461 | -32,813 | -144,283 | -192,071 | -1,587,113 | -2,741,377 | -30,155,147 |
Here are some more numbers to try:
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