A:
Positive:
1 x 774067755 x 1548135525 x 309627137 x 209207567 x 1155325185 x 418415335 x 231065925 x 836831249 x 619751675 x 462132479 x 312256245 x 12395
Negative:
-1 x -77406775-5 x -15481355-25 x -3096271-37 x -2092075-67 x -1155325-185 x -418415-335 x -231065-925 x -83683-1249 x -61975-1675 x -46213-2479 x -31225-6245 x -12395
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 77,406,775, 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 | 77,406,775 | |
| -1 | -77,406,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 77,406,775.
Example:
1 x 77,406,775 = 77,406,775
and
-1 x -77,406,775 = 77,406,775
Notice both answers equal 77,406,775
With that explanation out of the way, let's continue. Next, we take the number 77,406,775 and divide it by 2:
77,406,775 ÷ 2 = 38,703,387.5
If the quotient is a whole number, then 2 and 38,703,387.5 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 | 77,406,775 | |
| -1 | -77,406,775 |
Now, we try dividing 77,406,775 by 3:
77,406,775 ÷ 3 = 25,802,258.3333
If the quotient is a whole number, then 3 and 25,802,258.3333 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 | 77,406,775 | |
| -1 | -77,406,775 |
Let's try dividing by 4:
77,406,775 ÷ 4 = 19,351,693.75
If the quotient is a whole number, then 4 and 19,351,693.75 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 | 77,406,775 | |
| -1 | 77,406,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 37 | 67 | 185 | 335 | 925 | 1,249 | 1,675 | 2,479 | 6,245 | 12,395 | 31,225 | 46,213 | 61,975 | 83,683 | 231,065 | 418,415 | 1,155,325 | 2,092,075 | 3,096,271 | 15,481,355 | 77,406,775 |
| -1 | -5 | -25 | -37 | -67 | -185 | -335 | -925 | -1,249 | -1,675 | -2,479 | -6,245 | -12,395 | -31,225 | -46,213 | -61,975 | -83,683 | -231,065 | -418,415 | -1,155,325 | -2,092,075 | -3,096,271 | -15,481,355 | -77,406,775 |
Here are some more numbers to try:
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