A:
Positive:
1 x 31851055 x 6370217 x 45501511 x 28955535 x 9100355 x 5791177 x 41365385 x 8273
Negative:
-1 x -3185105-5 x -637021-7 x -455015-11 x -289555-35 x -91003-55 x -57911-77 x -41365-385 x -8273
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 3,185,105, 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 | 3,185,105 | |
| -1 | -3,185,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,185,105.
Example:
1 x 3,185,105 = 3,185,105
and
-1 x -3,185,105 = 3,185,105
Notice both answers equal 3,185,105
With that explanation out of the way, let's continue. Next, we take the number 3,185,105 and divide it by 2:
3,185,105 ÷ 2 = 1,592,552.5
If the quotient is a whole number, then 2 and 1,592,552.5 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 | 3,185,105 | |
| -1 | -3,185,105 |
Now, we try dividing 3,185,105 by 3:
3,185,105 ÷ 3 = 1,061,701.6667
If the quotient is a whole number, then 3 and 1,061,701.6667 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 | 3,185,105 | |
| -1 | -3,185,105 |
Let's try dividing by 4:
3,185,105 ÷ 4 = 796,276.25
If the quotient is a whole number, then 4 and 796,276.25 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 | 3,185,105 | |
| -1 | 3,185,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 8,273 | 41,365 | 57,911 | 91,003 | 289,555 | 455,015 | 637,021 | 3,185,105 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -8,273 | -41,365 | -57,911 | -91,003 | -289,555 | -455,015 | -637,021 | -3,185,105 |
Here are some more numbers to try:
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