A:
Positive:
1 x 8380424355 x 16760848729 x 28898015145 x 5779603619 x 13538653095 x 2707739337 x 8975517951 x 46685
Negative:
-1 x -838042435-5 x -167608487-29 x -28898015-145 x -5779603-619 x -1353865-3095 x -270773-9337 x -89755-17951 x -46685
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 838,042,435, 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 | 838,042,435 | |
| -1 | -838,042,435 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 838,042,435.
Example:
1 x 838,042,435 = 838,042,435
and
-1 x -838,042,435 = 838,042,435
Notice both answers equal 838,042,435
With that explanation out of the way, let's continue. Next, we take the number 838,042,435 and divide it by 2:
838,042,435 ÷ 2 = 419,021,217.5
If the quotient is a whole number, then 2 and 419,021,217.5 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 | 838,042,435 | |
| -1 | -838,042,435 |
Now, we try dividing 838,042,435 by 3:
838,042,435 ÷ 3 = 279,347,478.3333
If the quotient is a whole number, then 3 and 279,347,478.3333 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 | 838,042,435 | |
| -1 | -838,042,435 |
Let's try dividing by 4:
838,042,435 ÷ 4 = 209,510,608.75
If the quotient is a whole number, then 4 and 209,510,608.75 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 | 838,042,435 | |
| -1 | 838,042,435 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 619 | 3,095 | 9,337 | 17,951 | 46,685 | 89,755 | 270,773 | 1,353,865 | 5,779,603 | 28,898,015 | 167,608,487 | 838,042,435 |
| -1 | -5 | -29 | -145 | -619 | -3,095 | -9,337 | -17,951 | -46,685 | -89,755 | -270,773 | -1,353,865 | -5,779,603 | -28,898,015 | -167,608,487 | -838,042,435 |
Here are some more numbers to try:
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