A:
Positive:
1 x 40520123917 x 2383536719 x 21326381323 x 1254493643 x 6301731951 x 20768910931 x 3706912217 x 33167
Negative:
-1 x -405201239-17 x -23835367-19 x -21326381-323 x -1254493-643 x -630173-1951 x -207689-10931 x -37069-12217 x -33167
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 405,201,239, 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 | 405,201,239 | |
| -1 | -405,201,239 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 405,201,239.
Example:
1 x 405,201,239 = 405,201,239
and
-1 x -405,201,239 = 405,201,239
Notice both answers equal 405,201,239
With that explanation out of the way, let's continue. Next, we take the number 405,201,239 and divide it by 2:
405,201,239 ÷ 2 = 202,600,619.5
If the quotient is a whole number, then 2 and 202,600,619.5 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 | 405,201,239 | |
| -1 | -405,201,239 |
Now, we try dividing 405,201,239 by 3:
405,201,239 ÷ 3 = 135,067,079.6667
If the quotient is a whole number, then 3 and 135,067,079.6667 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 | 405,201,239 | |
| -1 | -405,201,239 |
Let's try dividing by 4:
405,201,239 ÷ 4 = 101,300,309.75
If the quotient is a whole number, then 4 and 101,300,309.75 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 | 405,201,239 | |
| -1 | 405,201,239 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 323 | 643 | 1,951 | 10,931 | 12,217 | 33,167 | 37,069 | 207,689 | 630,173 | 1,254,493 | 21,326,381 | 23,835,367 | 405,201,239 |
| -1 | -17 | -19 | -323 | -643 | -1,951 | -10,931 | -12,217 | -33,167 | -37,069 | -207,689 | -630,173 | -1,254,493 | -21,326,381 | -23,835,367 | -405,201,239 |
Here are some more numbers to try:
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