A:
Positive:
1 x 771118817 x 1101598311 x 701017117 x 453599377 x 1001453119 x 647999187 x 4123631309 x 58909
Negative:
-1 x -77111881-7 x -11015983-11 x -7010171-17 x -4535993-77 x -1001453-119 x -647999-187 x -412363-1309 x -58909
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 77,111,881, 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 | 77,111,881 | |
| -1 | -77,111,881 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,111,881.
Example:
1 x 77,111,881 = 77,111,881
and
-1 x -77,111,881 = 77,111,881
Notice both answers equal 77,111,881
With that explanation out of the way, let's continue. Next, we take the number 77,111,881 and divide it by 2:
77,111,881 ÷ 2 = 38,555,940.5
If the quotient is a whole number, then 2 and 38,555,940.5 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 | 77,111,881 | |
| -1 | -77,111,881 |
Now, we try dividing 77,111,881 by 3:
77,111,881 ÷ 3 = 25,703,960.3333
If the quotient is a whole number, then 3 and 25,703,960.3333 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 | 77,111,881 | |
| -1 | -77,111,881 |
Let's try dividing by 4:
77,111,881 ÷ 4 = 19,277,970.25
If the quotient is a whole number, then 4 and 19,277,970.25 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 | 77,111,881 | |
| -1 | 77,111,881 |
If you did it right, you will end up with this table:
| 1 | 7 | 11 | 17 | 77 | 119 | 187 | 1,309 | 58,909 | 412,363 | 647,999 | 1,001,453 | 4,535,993 | 7,010,171 | 11,015,983 | 77,111,881 |
| -1 | -7 | -11 | -17 | -77 | -119 | -187 | -1,309 | -58,909 | -412,363 | -647,999 | -1,001,453 | -4,535,993 | -7,010,171 | -11,015,983 | -77,111,881 |
Here are some more numbers to try:
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