A:
Positive:
1 x 32107255 x 6421457 x 45867525 x 12842935 x 9173549 x 65525175 x 18347245 x 131051225 x 2621
Negative:
-1 x -3210725-5 x -642145-7 x -458675-25 x -128429-35 x -91735-49 x -65525-175 x -18347-245 x -13105-1225 x -2621
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 3,210,725, 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 | 3,210,725 | |
| -1 | -3,210,725 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,210,725.
Example:
1 x 3,210,725 = 3,210,725
and
-1 x -3,210,725 = 3,210,725
Notice both answers equal 3,210,725
With that explanation out of the way, let's continue. Next, we take the number 3,210,725 and divide it by 2:
3,210,725 ÷ 2 = 1,605,362.5
If the quotient is a whole number, then 2 and 1,605,362.5 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 | 3,210,725 | |
| -1 | -3,210,725 |
Now, we try dividing 3,210,725 by 3:
3,210,725 ÷ 3 = 1,070,241.6667
If the quotient is a whole number, then 3 and 1,070,241.6667 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 | 3,210,725 | |
| -1 | -3,210,725 |
Let's try dividing by 4:
3,210,725 ÷ 4 = 802,681.25
If the quotient is a whole number, then 4 and 802,681.25 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 | 3,210,725 | |
| -1 | 3,210,725 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 49 | 175 | 245 | 1,225 | 2,621 | 13,105 | 18,347 | 65,525 | 91,735 | 128,429 | 458,675 | 642,145 | 3,210,725 |
| -1 | -5 | -7 | -25 | -35 | -49 | -175 | -245 | -1,225 | -2,621 | -13,105 | -18,347 | -65,525 | -91,735 | -128,429 | -458,675 | -642,145 | -3,210,725 |
Here are some more numbers to try:
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