A:
Positive:
1 x 79407797 x 113439711 x 72188977 x 103127281 x 28259367 x 216371967 x 40372569 x 3091
Negative:
-1 x -7940779-7 x -1134397-11 x -721889-77 x -103127-281 x -28259-367 x -21637-1967 x -4037-2569 x -3091
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 7,940,779, 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 | 7,940,779 | |
| -1 | -7,940,779 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,940,779.
Example:
1 x 7,940,779 = 7,940,779
and
-1 x -7,940,779 = 7,940,779
Notice both answers equal 7,940,779
With that explanation out of the way, let's continue. Next, we take the number 7,940,779 and divide it by 2:
7,940,779 ÷ 2 = 3,970,389.5
If the quotient is a whole number, then 2 and 3,970,389.5 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 | 7,940,779 | |
| -1 | -7,940,779 |
Now, we try dividing 7,940,779 by 3:
7,940,779 ÷ 3 = 2,646,926.3333
If the quotient is a whole number, then 3 and 2,646,926.3333 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 | 7,940,779 | |
| -1 | -7,940,779 |
Let's try dividing by 4:
7,940,779 ÷ 4 = 1,985,194.75
If the quotient is a whole number, then 4 and 1,985,194.75 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 | 7,940,779 | |
| -1 | 7,940,779 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 77 | 281 | 367 | 1,967 | 2,569 | 3,091 | 4,037 | 21,637 | 28,259 | 103,127 | 721,889 | 1,134,397 | 7,940,779 |
| -1 | -7 | -11 | -77 | -281 | -367 | -1,967 | -2,569 | -3,091 | -4,037 | -21,637 | -28,259 | -103,127 | -721,889 | -1,134,397 | -7,940,779 |
Here are some more numbers to try:
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