A:
Positive:
1 x 6210047155 x 12420094323 x 27000205115 x 54000411471 x 4221653671 x 1691657355 x 8443318355 x 33833
Negative:
-1 x -621004715-5 x -124200943-23 x -27000205-115 x -5400041-1471 x -422165-3671 x -169165-7355 x -84433-18355 x -33833
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 621,004,715, 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 | 621,004,715 | |
| -1 | -621,004,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 621,004,715.
Example:
1 x 621,004,715 = 621,004,715
and
-1 x -621,004,715 = 621,004,715
Notice both answers equal 621,004,715
With that explanation out of the way, let's continue. Next, we take the number 621,004,715 and divide it by 2:
621,004,715 ÷ 2 = 310,502,357.5
If the quotient is a whole number, then 2 and 310,502,357.5 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 | 621,004,715 | |
| -1 | -621,004,715 |
Now, we try dividing 621,004,715 by 3:
621,004,715 ÷ 3 = 207,001,571.6667
If the quotient is a whole number, then 3 and 207,001,571.6667 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 | 621,004,715 | |
| -1 | -621,004,715 |
Let's try dividing by 4:
621,004,715 ÷ 4 = 155,251,178.75
If the quotient is a whole number, then 4 and 155,251,178.75 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 | 621,004,715 | |
| -1 | 621,004,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 1,471 | 3,671 | 7,355 | 18,355 | 33,833 | 84,433 | 169,165 | 422,165 | 5,400,041 | 27,000,205 | 124,200,943 | 621,004,715 |
| -1 | -5 | -23 | -115 | -1,471 | -3,671 | -7,355 | -18,355 | -33,833 | -84,433 | -169,165 | -422,165 | -5,400,041 | -27,000,205 | -124,200,943 | -621,004,715 |
Here are some more numbers to try:
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