A:
Positive:
1 x 6578041319 x 346212737 x 1777849137 x 480149683 x 96311703 x 935712603 x 252715069 x 12977
Negative:
-1 x -65780413-19 x -3462127-37 x -1777849-137 x -480149-683 x -96311-703 x -93571-2603 x -25271-5069 x -12977
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 65,780,413, 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 | 65,780,413 | |
| -1 | -65,780,413 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 65,780,413.
Example:
1 x 65,780,413 = 65,780,413
and
-1 x -65,780,413 = 65,780,413
Notice both answers equal 65,780,413
With that explanation out of the way, let's continue. Next, we take the number 65,780,413 and divide it by 2:
65,780,413 ÷ 2 = 32,890,206.5
If the quotient is a whole number, then 2 and 32,890,206.5 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 | 65,780,413 | |
| -1 | -65,780,413 |
Now, we try dividing 65,780,413 by 3:
65,780,413 ÷ 3 = 21,926,804.3333
If the quotient is a whole number, then 3 and 21,926,804.3333 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 | 65,780,413 | |
| -1 | -65,780,413 |
Let's try dividing by 4:
65,780,413 ÷ 4 = 16,445,103.25
If the quotient is a whole number, then 4 and 16,445,103.25 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 | 65,780,413 | |
| -1 | 65,780,413 |
If you did it right, you will end up with this table:
| 1 | 19 | 37 | 137 | 683 | 703 | 2,603 | 5,069 | 12,977 | 25,271 | 93,571 | 96,311 | 480,149 | 1,777,849 | 3,462,127 | 65,780,413 |
| -1 | -19 | -37 | -137 | -683 | -703 | -2,603 | -5,069 | -12,977 | -25,271 | -93,571 | -96,311 | -480,149 | -1,777,849 | -3,462,127 | -65,780,413 |
Here are some more numbers to try:
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