A:
Positive:
1 x 3090802 x 1545404 x 772705 x 618168 x 3863510 x 3090820 x 1545440 x 7727
Negative:
-1 x -309080-2 x -154540-4 x -77270-5 x -61816-8 x -38635-10 x -30908-20 x -15454-40 x -7727
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 309,080, 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 | 309,080 | |
| -1 | -309,080 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 309,080.
Example:
1 x 309,080 = 309,080
and
-1 x -309,080 = 309,080
Notice both answers equal 309,080
With that explanation out of the way, let's continue. Next, we take the number 309,080 and divide it by 2:
309,080 ÷ 2 = 154,540
If the quotient is a whole number, then 2 and 154,540 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!
Here is what our table should look like at this step:
| 1 | 2 | 154,540 | 309,080 | |
| -1 | -2 | -154,540 | -309,080 |
Now, we try dividing 309,080 by 3:
309,080 ÷ 3 = 103,026.6667
If the quotient is a whole number, then 3 and 103,026.6667 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 | 2 | 154,540 | 309,080 | |
| -1 | -2 | -154,540 | -309,080 |
Let's try dividing by 4:
309,080 ÷ 4 = 77,270
If the quotient is a whole number, then 4 and 77,270 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!
Here is what our table should look like at this step:
| 1 | 2 | 4 | 77,270 | 154,540 | 309,080 | |
| -1 | -2 | -4 | -77,270 | -154,540 | 309,080 |
If you did it right, you will end up with this table:
| 1 | 2 | 4 | 5 | 8 | 10 | 20 | 40 | 7,727 | 15,454 | 30,908 | 38,635 | 61,816 | 77,270 | 154,540 | 309,080 |
| -1 | -2 | -4 | -5 | -8 | -10 | -20 | -40 | -7,727 | -15,454 | -30,908 | -38,635 | -61,816 | -77,270 | -154,540 | -309,080 |
Here are some more numbers to try:
Try the factor calculator