A:
Positive:
1 x 7281077917 x 428298759 x 1234081229 x 317951317 x 2296871003 x 725933893 x 187035389 x 13511
Negative:
-1 x -72810779-17 x -4282987-59 x -1234081-229 x -317951-317 x -229687-1003 x -72593-3893 x -18703-5389 x -13511
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 72,810,779, 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 | 72,810,779 | |
| -1 | -72,810,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,810,779.
Example:
1 x 72,810,779 = 72,810,779
and
-1 x -72,810,779 = 72,810,779
Notice both answers equal 72,810,779
With that explanation out of the way, let's continue. Next, we take the number 72,810,779 and divide it by 2:
72,810,779 ÷ 2 = 36,405,389.5
If the quotient is a whole number, then 2 and 36,405,389.5 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 | 72,810,779 | |
| -1 | -72,810,779 |
Now, we try dividing 72,810,779 by 3:
72,810,779 ÷ 3 = 24,270,259.6667
If the quotient is a whole number, then 3 and 24,270,259.6667 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 | 72,810,779 | |
| -1 | -72,810,779 |
Let's try dividing by 4:
72,810,779 ÷ 4 = 18,202,694.75
If the quotient is a whole number, then 4 and 18,202,694.75 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 | 72,810,779 | |
| -1 | 72,810,779 |
If you did it right, you will end up with this table:
| 1 | 17 | 59 | 229 | 317 | 1,003 | 3,893 | 5,389 | 13,511 | 18,703 | 72,593 | 229,687 | 317,951 | 1,234,081 | 4,282,987 | 72,810,779 |
| -1 | -17 | -59 | -229 | -317 | -1,003 | -3,893 | -5,389 | -13,511 | -18,703 | -72,593 | -229,687 | -317,951 | -1,234,081 | -4,282,987 | -72,810,779 |
Here are some more numbers to try:
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