A:
Positive:
1 x 777671055 x 1555342113 x 598208565 x 1196417311 x 2500551555 x 500113847 x 202154043 x 19235
Negative:
-1 x -77767105-5 x -15553421-13 x -5982085-65 x -1196417-311 x -250055-1555 x -50011-3847 x -20215-4043 x -19235
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 77,767,105, 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 | 77,767,105 | |
| -1 | -77,767,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,767,105.
Example:
1 x 77,767,105 = 77,767,105
and
-1 x -77,767,105 = 77,767,105
Notice both answers equal 77,767,105
With that explanation out of the way, let's continue. Next, we take the number 77,767,105 and divide it by 2:
77,767,105 ÷ 2 = 38,883,552.5
If the quotient is a whole number, then 2 and 38,883,552.5 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 | 77,767,105 | |
| -1 | -77,767,105 |
Now, we try dividing 77,767,105 by 3:
77,767,105 ÷ 3 = 25,922,368.3333
If the quotient is a whole number, then 3 and 25,922,368.3333 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 | 77,767,105 | |
| -1 | -77,767,105 |
Let's try dividing by 4:
77,767,105 ÷ 4 = 19,441,776.25
If the quotient is a whole number, then 4 and 19,441,776.25 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 | 77,767,105 | |
| -1 | 77,767,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 311 | 1,555 | 3,847 | 4,043 | 19,235 | 20,215 | 50,011 | 250,055 | 1,196,417 | 5,982,085 | 15,553,421 | 77,767,105 |
| -1 | -5 | -13 | -65 | -311 | -1,555 | -3,847 | -4,043 | -19,235 | -20,215 | -50,011 | -250,055 | -1,196,417 | -5,982,085 | -15,553,421 | -77,767,105 |
Here are some more numbers to try:
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