A:
Positive:
1 x 3080156455 x 616031297 x 4400223535 x 8800447541 x 5693452705 x 1138693787 x 8133516267 x 18935
Negative:
-1 x -308015645-5 x -61603129-7 x -44002235-35 x -8800447-541 x -569345-2705 x -113869-3787 x -81335-16267 x -18935
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 308,015,645, 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 | 308,015,645 | |
| -1 | -308,015,645 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 308,015,645.
Example:
1 x 308,015,645 = 308,015,645
and
-1 x -308,015,645 = 308,015,645
Notice both answers equal 308,015,645
With that explanation out of the way, let's continue. Next, we take the number 308,015,645 and divide it by 2:
308,015,645 ÷ 2 = 154,007,822.5
If the quotient is a whole number, then 2 and 154,007,822.5 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 | 308,015,645 | |
| -1 | -308,015,645 |
Now, we try dividing 308,015,645 by 3:
308,015,645 ÷ 3 = 102,671,881.6667
If the quotient is a whole number, then 3 and 102,671,881.6667 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 | 308,015,645 | |
| -1 | -308,015,645 |
Let's try dividing by 4:
308,015,645 ÷ 4 = 77,003,911.25
If the quotient is a whole number, then 4 and 77,003,911.25 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 | 308,015,645 | |
| -1 | 308,015,645 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 541 | 2,705 | 3,787 | 16,267 | 18,935 | 81,335 | 113,869 | 569,345 | 8,800,447 | 44,002,235 | 61,603,129 | 308,015,645 |
| -1 | -5 | -7 | -35 | -541 | -2,705 | -3,787 | -16,267 | -18,935 | -81,335 | -113,869 | -569,345 | -8,800,447 | -44,002,235 | -61,603,129 | -308,015,645 |
Here are some more numbers to try:
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