A:
Positive:
1 x 312681855 x 625363713 x 240524517 x 183930565 x 48104985 x 367861221 x 1414851105 x 28297
Negative:
-1 x -31268185-5 x -6253637-13 x -2405245-17 x -1839305-65 x -481049-85 x -367861-221 x -141485-1105 x -28297
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 31,268,185, 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 | 31,268,185 | |
| -1 | -31,268,185 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,268,185.
Example:
1 x 31,268,185 = 31,268,185
and
-1 x -31,268,185 = 31,268,185
Notice both answers equal 31,268,185
With that explanation out of the way, let's continue. Next, we take the number 31,268,185 and divide it by 2:
31,268,185 ÷ 2 = 15,634,092.5
If the quotient is a whole number, then 2 and 15,634,092.5 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 | 31,268,185 | |
| -1 | -31,268,185 |
Now, we try dividing 31,268,185 by 3:
31,268,185 ÷ 3 = 10,422,728.3333
If the quotient is a whole number, then 3 and 10,422,728.3333 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 | 31,268,185 | |
| -1 | -31,268,185 |
Let's try dividing by 4:
31,268,185 ÷ 4 = 7,817,046.25
If the quotient is a whole number, then 4 and 7,817,046.25 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 | 31,268,185 | |
| -1 | 31,268,185 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 17 | 65 | 85 | 221 | 1,105 | 28,297 | 141,485 | 367,861 | 481,049 | 1,839,305 | 2,405,245 | 6,253,637 | 31,268,185 |
| -1 | -5 | -13 | -17 | -65 | -85 | -221 | -1,105 | -28,297 | -141,485 | -367,861 | -481,049 | -1,839,305 | -2,405,245 | -6,253,637 | -31,268,185 |
Here are some more numbers to try:
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