A:
Positive:
1 x 2872877 x 4104111 x 2611713 x 2209941 x 700749 x 586377 x 373191 x 3157143 x 2009287 x 1001451 x 637533 x 539
Negative:
-1 x -287287-7 x -41041-11 x -26117-13 x -22099-41 x -7007-49 x -5863-77 x -3731-91 x -3157-143 x -2009-287 x -1001-451 x -637-533 x -539
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 287,287, 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 | 287,287 | |
| -1 | -287,287 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 287,287.
Example:
1 x 287,287 = 287,287
and
-1 x -287,287 = 287,287
Notice both answers equal 287,287
With that explanation out of the way, let's continue. Next, we take the number 287,287 and divide it by 2:
287,287 ÷ 2 = 143,643.5
If the quotient is a whole number, then 2 and 143,643.5 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 | 287,287 | |
| -1 | -287,287 |
Now, we try dividing 287,287 by 3:
287,287 ÷ 3 = 95,762.3333
If the quotient is a whole number, then 3 and 95,762.3333 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 | 287,287 | |
| -1 | -287,287 |
Let's try dividing by 4:
287,287 ÷ 4 = 71,821.75
If the quotient is a whole number, then 4 and 71,821.75 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 | 287,287 | |
| -1 | 287,287 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 13 | 41 | 49 | 77 | 91 | 143 | 287 | 451 | 533 | 539 | 637 | 1,001 | 2,009 | 3,157 | 3,731 | 5,863 | 7,007 | 22,099 | 26,117 | 41,041 | 287,287 |
| -1 | -7 | -11 | -13 | -41 | -49 | -77 | -91 | -143 | -287 | -451 | -533 | -539 | -637 | -1,001 | -2,009 | -3,157 | -3,731 | -5,863 | -7,007 | -22,099 | -26,117 | -41,041 | -287,287 |
Here are some more numbers to try:
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