A:
Positive:
1 x 31298055 x 6259617 x 44711535 x 89423223 x 14035401 x 78051115 x 28071561 x 2005
Negative:
-1 x -3129805-5 x -625961-7 x -447115-35 x -89423-223 x -14035-401 x -7805-1115 x -2807-1561 x -2005
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 3,129,805, 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 | 3,129,805 | |
| -1 | -3,129,805 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,129,805.
Example:
1 x 3,129,805 = 3,129,805
and
-1 x -3,129,805 = 3,129,805
Notice both answers equal 3,129,805
With that explanation out of the way, let's continue. Next, we take the number 3,129,805 and divide it by 2:
3,129,805 ÷ 2 = 1,564,902.5
If the quotient is a whole number, then 2 and 1,564,902.5 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 | 3,129,805 | |
| -1 | -3,129,805 |
Now, we try dividing 3,129,805 by 3:
3,129,805 ÷ 3 = 1,043,268.3333
If the quotient is a whole number, then 3 and 1,043,268.3333 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 | 3,129,805 | |
| -1 | -3,129,805 |
Let's try dividing by 4:
3,129,805 ÷ 4 = 782,451.25
If the quotient is a whole number, then 4 and 782,451.25 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 | 3,129,805 | |
| -1 | 3,129,805 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 223 | 401 | 1,115 | 1,561 | 2,005 | 2,807 | 7,805 | 14,035 | 89,423 | 447,115 | 625,961 | 3,129,805 |
| -1 | -5 | -7 | -35 | -223 | -401 | -1,115 | -1,561 | -2,005 | -2,807 | -7,805 | -14,035 | -89,423 | -447,115 | -625,961 | -3,129,805 |
Here are some more numbers to try:
Try the factor calculator