A:
Positive:
1 x 310388055 x 62077617 x 443411535 x 88682349 x 633445151 x 205555245 x 126689755 x 41111839 x 369951057 x 293654195 x 73995285 x 5873
Negative:
-1 x -31038805-5 x -6207761-7 x -4434115-35 x -886823-49 x -633445-151 x -205555-245 x -126689-755 x -41111-839 x -36995-1057 x -29365-4195 x -7399-5285 x -5873
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 31,038,805, 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 | 31,038,805 | |
| -1 | -31,038,805 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,038,805.
Example:
1 x 31,038,805 = 31,038,805
and
-1 x -31,038,805 = 31,038,805
Notice both answers equal 31,038,805
With that explanation out of the way, let's continue. Next, we take the number 31,038,805 and divide it by 2:
31,038,805 ÷ 2 = 15,519,402.5
If the quotient is a whole number, then 2 and 15,519,402.5 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 | 31,038,805 | |
| -1 | -31,038,805 |
Now, we try dividing 31,038,805 by 3:
31,038,805 ÷ 3 = 10,346,268.3333
If the quotient is a whole number, then 3 and 10,346,268.3333 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 | 31,038,805 | |
| -1 | -31,038,805 |
Let's try dividing by 4:
31,038,805 ÷ 4 = 7,759,701.25
If the quotient is a whole number, then 4 and 7,759,701.25 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 | 31,038,805 | |
| -1 | 31,038,805 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 151 | 245 | 755 | 839 | 1,057 | 4,195 | 5,285 | 5,873 | 7,399 | 29,365 | 36,995 | 41,111 | 126,689 | 205,555 | 633,445 | 886,823 | 4,434,115 | 6,207,761 | 31,038,805 |
| -1 | -5 | -7 | -35 | -49 | -151 | -245 | -755 | -839 | -1,057 | -4,195 | -5,285 | -5,873 | -7,399 | -29,365 | -36,995 | -41,111 | -126,689 | -205,555 | -633,445 | -886,823 | -4,434,115 | -6,207,761 | -31,038,805 |
Here are some more numbers to try:
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