A:
Positive:
1 x 30578628743 x 7111309101 x 3027587181 x 1689427389 x 7860834343 x 704097783 x 3928916727 x 18281
Negative:
-1 x -305786287-43 x -7111309-101 x -3027587-181 x -1689427-389 x -786083-4343 x -70409-7783 x -39289-16727 x -18281
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 305,786,287, 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 | 305,786,287 | |
| -1 | -305,786,287 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 305,786,287.
Example:
1 x 305,786,287 = 305,786,287
and
-1 x -305,786,287 = 305,786,287
Notice both answers equal 305,786,287
With that explanation out of the way, let's continue. Next, we take the number 305,786,287 and divide it by 2:
305,786,287 ÷ 2 = 152,893,143.5
If the quotient is a whole number, then 2 and 152,893,143.5 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 | 305,786,287 | |
| -1 | -305,786,287 |
Now, we try dividing 305,786,287 by 3:
305,786,287 ÷ 3 = 101,928,762.3333
If the quotient is a whole number, then 3 and 101,928,762.3333 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 | 305,786,287 | |
| -1 | -305,786,287 |
Let's try dividing by 4:
305,786,287 ÷ 4 = 76,446,571.75
If the quotient is a whole number, then 4 and 76,446,571.75 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 | 305,786,287 | |
| -1 | 305,786,287 |
If you did it right, you will end up with this table:
| 1 | 43 | 101 | 181 | 389 | 4,343 | 7,783 | 16,727 | 18,281 | 39,289 | 70,409 | 786,083 | 1,689,427 | 3,027,587 | 7,111,309 | 305,786,287 |
| -1 | -43 | -101 | -181 | -389 | -4,343 | -7,783 | -16,727 | -18,281 | -39,289 | -70,409 | -786,083 | -1,689,427 | -3,027,587 | -7,111,309 | -305,786,287 |
Here are some more numbers to try:
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