A:
Positive:
1 x 398058355 x 796116729 x 1372615145 x 274523271 x 1468851013 x 392951355 x 293775065 x 7859
Negative:
-1 x -39805835-5 x -7961167-29 x -1372615-145 x -274523-271 x -146885-1013 x -39295-1355 x -29377-5065 x -7859
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 39,805,835, 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 | 39,805,835 | |
| -1 | -39,805,835 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 39,805,835.
Example:
1 x 39,805,835 = 39,805,835
and
-1 x -39,805,835 = 39,805,835
Notice both answers equal 39,805,835
With that explanation out of the way, let's continue. Next, we take the number 39,805,835 and divide it by 2:
39,805,835 ÷ 2 = 19,902,917.5
If the quotient is a whole number, then 2 and 19,902,917.5 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 | 39,805,835 | |
| -1 | -39,805,835 |
Now, we try dividing 39,805,835 by 3:
39,805,835 ÷ 3 = 13,268,611.6667
If the quotient is a whole number, then 3 and 13,268,611.6667 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 | 39,805,835 | |
| -1 | -39,805,835 |
Let's try dividing by 4:
39,805,835 ÷ 4 = 9,951,458.75
If the quotient is a whole number, then 4 and 9,951,458.75 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 | 39,805,835 | |
| -1 | 39,805,835 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 271 | 1,013 | 1,355 | 5,065 | 7,859 | 29,377 | 39,295 | 146,885 | 274,523 | 1,372,615 | 7,961,167 | 39,805,835 |
| -1 | -5 | -29 | -145 | -271 | -1,013 | -1,355 | -5,065 | -7,859 | -29,377 | -39,295 | -146,885 | -274,523 | -1,372,615 | -7,961,167 | -39,805,835 |
Here are some more numbers to try:
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