A:
Positive:
1 x 774139855 x 1548279711 x 703763555 x 1407527121 x 639785199 x 389015605 x 127957643 x 120395995 x 778032189 x 353653215 x 240797073 x 10945
Negative:
-1 x -77413985-5 x -15482797-11 x -7037635-55 x -1407527-121 x -639785-199 x -389015-605 x -127957-643 x -120395-995 x -77803-2189 x -35365-3215 x -24079-7073 x -10945
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 77,413,985, 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 | 77,413,985 | |
| -1 | -77,413,985 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,413,985.
Example:
1 x 77,413,985 = 77,413,985
and
-1 x -77,413,985 = 77,413,985
Notice both answers equal 77,413,985
With that explanation out of the way, let's continue. Next, we take the number 77,413,985 and divide it by 2:
77,413,985 ÷ 2 = 38,706,992.5
If the quotient is a whole number, then 2 and 38,706,992.5 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 | 77,413,985 | |
| -1 | -77,413,985 |
Now, we try dividing 77,413,985 by 3:
77,413,985 ÷ 3 = 25,804,661.6667
If the quotient is a whole number, then 3 and 25,804,661.6667 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 | 77,413,985 | |
| -1 | -77,413,985 |
Let's try dividing by 4:
77,413,985 ÷ 4 = 19,353,496.25
If the quotient is a whole number, then 4 and 19,353,496.25 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 | 77,413,985 | |
| -1 | 77,413,985 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 121 | 199 | 605 | 643 | 995 | 2,189 | 3,215 | 7,073 | 10,945 | 24,079 | 35,365 | 77,803 | 120,395 | 127,957 | 389,015 | 639,785 | 1,407,527 | 7,037,635 | 15,482,797 | 77,413,985 |
| -1 | -5 | -11 | -55 | -121 | -199 | -605 | -643 | -995 | -2,189 | -3,215 | -7,073 | -10,945 | -24,079 | -35,365 | -77,803 | -120,395 | -127,957 | -389,015 | -639,785 | -1,407,527 | -7,037,635 | -15,482,797 | -77,413,985 |
Here are some more numbers to try:
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