A:
Positive:
1 x 787774911 x 71615917 x 463397103 x 76483187 x 42127409 x 192611133 x 69531751 x 4499
Negative:
-1 x -7877749-11 x -716159-17 x -463397-103 x -76483-187 x -42127-409 x -19261-1133 x -6953-1751 x -4499
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 7,877,749, 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 | 7,877,749 | |
| -1 | -7,877,749 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,877,749.
Example:
1 x 7,877,749 = 7,877,749
and
-1 x -7,877,749 = 7,877,749
Notice both answers equal 7,877,749
With that explanation out of the way, let's continue. Next, we take the number 7,877,749 and divide it by 2:
7,877,749 ÷ 2 = 3,938,874.5
If the quotient is a whole number, then 2 and 3,938,874.5 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 | 7,877,749 | |
| -1 | -7,877,749 |
Now, we try dividing 7,877,749 by 3:
7,877,749 ÷ 3 = 2,625,916.3333
If the quotient is a whole number, then 3 and 2,625,916.3333 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 | 7,877,749 | |
| -1 | -7,877,749 |
Let's try dividing by 4:
7,877,749 ÷ 4 = 1,969,437.25
If the quotient is a whole number, then 4 and 1,969,437.25 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 | 7,877,749 | |
| -1 | 7,877,749 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 103 | 187 | 409 | 1,133 | 1,751 | 4,499 | 6,953 | 19,261 | 42,127 | 76,483 | 463,397 | 716,159 | 7,877,749 |
| -1 | -11 | -17 | -103 | -187 | -409 | -1,133 | -1,751 | -4,499 | -6,953 | -19,261 | -42,127 | -76,483 | -463,397 | -716,159 | -7,877,749 |
Here are some more numbers to try:
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