A:
Positive:
1 x 301080855 x 60216177 x 430115535 x 86023179 x 381115395 x 76223553 x 544452765 x 10889
Negative:
-1 x -30108085-5 x -6021617-7 x -4301155-35 x -860231-79 x -381115-395 x -76223-553 x -54445-2765 x -10889
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 30,108,085, 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 | 30,108,085 | |
| -1 | -30,108,085 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 30,108,085.
Example:
1 x 30,108,085 = 30,108,085
and
-1 x -30,108,085 = 30,108,085
Notice both answers equal 30,108,085
With that explanation out of the way, let's continue. Next, we take the number 30,108,085 and divide it by 2:
30,108,085 ÷ 2 = 15,054,042.5
If the quotient is a whole number, then 2 and 15,054,042.5 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 | 30,108,085 | |
| -1 | -30,108,085 |
Now, we try dividing 30,108,085 by 3:
30,108,085 ÷ 3 = 10,036,028.3333
If the quotient is a whole number, then 3 and 10,036,028.3333 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 | 30,108,085 | |
| -1 | -30,108,085 |
Let's try dividing by 4:
30,108,085 ÷ 4 = 7,527,021.25
If the quotient is a whole number, then 4 and 7,527,021.25 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 | 30,108,085 | |
| -1 | 30,108,085 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 79 | 395 | 553 | 2,765 | 10,889 | 54,445 | 76,223 | 381,115 | 860,231 | 4,301,155 | 6,021,617 | 30,108,085 |
| -1 | -5 | -7 | -35 | -79 | -395 | -553 | -2,765 | -10,889 | -54,445 | -76,223 | -381,115 | -860,231 | -4,301,155 | -6,021,617 | -30,108,085 |
Here are some more numbers to try:
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