A:
Positive:
1 x 677804055 x 135560817 x 968291511 x 616185535 x 193658355 x 123237177 x 880265385 x 176053
Negative:
-1 x -67780405-5 x -13556081-7 x -9682915-11 x -6161855-35 x -1936583-55 x -1232371-77 x -880265-385 x -176053
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 67,780,405, 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 | 67,780,405 | |
| -1 | -67,780,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 67,780,405.
Example:
1 x 67,780,405 = 67,780,405
and
-1 x -67,780,405 = 67,780,405
Notice both answers equal 67,780,405
With that explanation out of the way, let's continue. Next, we take the number 67,780,405 and divide it by 2:
67,780,405 ÷ 2 = 33,890,202.5
If the quotient is a whole number, then 2 and 33,890,202.5 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 | 67,780,405 | |
| -1 | -67,780,405 |
Now, we try dividing 67,780,405 by 3:
67,780,405 ÷ 3 = 22,593,468.3333
If the quotient is a whole number, then 3 and 22,593,468.3333 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 | 67,780,405 | |
| -1 | -67,780,405 |
Let's try dividing by 4:
67,780,405 ÷ 4 = 16,945,101.25
If the quotient is a whole number, then 4 and 16,945,101.25 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 | 67,780,405 | |
| -1 | 67,780,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 55 | 77 | 385 | 176,053 | 880,265 | 1,232,371 | 1,936,583 | 6,161,855 | 9,682,915 | 13,556,081 | 67,780,405 |
| -1 | -5 | -7 | -11 | -35 | -55 | -77 | -385 | -176,053 | -880,265 | -1,232,371 | -1,936,583 | -6,161,855 | -9,682,915 | -13,556,081 | -67,780,405 |
Here are some more numbers to try:
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