A:
Positive:
1 x 71872577 x 102675111 x 65338731 x 23184777 x 93341217 x 33121341 x 210772387 x 3011
Negative:
-1 x -7187257-7 x -1026751-11 x -653387-31 x -231847-77 x -93341-217 x -33121-341 x -21077-2387 x -3011
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 7,187,257, 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 | 7,187,257 | |
| -1 | -7,187,257 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,187,257.
Example:
1 x 7,187,257 = 7,187,257
and
-1 x -7,187,257 = 7,187,257
Notice both answers equal 7,187,257
With that explanation out of the way, let's continue. Next, we take the number 7,187,257 and divide it by 2:
7,187,257 ÷ 2 = 3,593,628.5
If the quotient is a whole number, then 2 and 3,593,628.5 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 | 7,187,257 | |
| -1 | -7,187,257 |
Now, we try dividing 7,187,257 by 3:
7,187,257 ÷ 3 = 2,395,752.3333
If the quotient is a whole number, then 3 and 2,395,752.3333 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 | 7,187,257 | |
| -1 | -7,187,257 |
Let's try dividing by 4:
7,187,257 ÷ 4 = 1,796,814.25
If the quotient is a whole number, then 4 and 1,796,814.25 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 | 7,187,257 | |
| -1 | 7,187,257 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 31 | 77 | 217 | 341 | 2,387 | 3,011 | 21,077 | 33,121 | 93,341 | 231,847 | 653,387 | 1,026,751 | 7,187,257 |
| -1 | -7 | -11 | -31 | -77 | -217 | -341 | -2,387 | -3,011 | -21,077 | -33,121 | -93,341 | -231,847 | -653,387 | -1,026,751 | -7,187,257 |
Here are some more numbers to try:
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