A:
Positive:
1 x 78637797 x 112339711 x 71488973 x 10772377 x 102127511 x 15389803 x 97931399 x 5621
Negative:
-1 x -7863779-7 x -1123397-11 x -714889-73 x -107723-77 x -102127-511 x -15389-803 x -9793-1399 x -5621
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 7,863,779, 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 | 7,863,779 | |
| -1 | -7,863,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,863,779.
Example:
1 x 7,863,779 = 7,863,779
and
-1 x -7,863,779 = 7,863,779
Notice both answers equal 7,863,779
With that explanation out of the way, let's continue. Next, we take the number 7,863,779 and divide it by 2:
7,863,779 ÷ 2 = 3,931,889.5
If the quotient is a whole number, then 2 and 3,931,889.5 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 | 7,863,779 | |
| -1 | -7,863,779 |
Now, we try dividing 7,863,779 by 3:
7,863,779 ÷ 3 = 2,621,259.6667
If the quotient is a whole number, then 3 and 2,621,259.6667 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 | 7,863,779 | |
| -1 | -7,863,779 |
Let's try dividing by 4:
7,863,779 ÷ 4 = 1,965,944.75
If the quotient is a whole number, then 4 and 1,965,944.75 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 | 7,863,779 | |
| -1 | 7,863,779 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 73 | 77 | 511 | 803 | 1,399 | 5,621 | 9,793 | 15,389 | 102,127 | 107,723 | 714,889 | 1,123,397 | 7,863,779 |
| -1 | -7 | -11 | -73 | -77 | -511 | -803 | -1,399 | -5,621 | -9,793 | -15,389 | -102,127 | -107,723 | -714,889 | -1,123,397 | -7,863,779 |
Here are some more numbers to try:
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