A:
Positive:
1 x 6614477755 x 13228955525 x 2645791131 x 21337025155 x 4267405775 x 853481
Negative:
-1 x -661447775-5 x -132289555-25 x -26457911-31 x -21337025-155 x -4267405-775 x -853481
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 661,447,775, 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 | 661,447,775 | |
| -1 | -661,447,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 661,447,775.
Example:
1 x 661,447,775 = 661,447,775
and
-1 x -661,447,775 = 661,447,775
Notice both answers equal 661,447,775
With that explanation out of the way, let's continue. Next, we take the number 661,447,775 and divide it by 2:
661,447,775 ÷ 2 = 330,723,887.5
If the quotient is a whole number, then 2 and 330,723,887.5 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 | 661,447,775 | |
| -1 | -661,447,775 |
Now, we try dividing 661,447,775 by 3:
661,447,775 ÷ 3 = 220,482,591.6667
If the quotient is a whole number, then 3 and 220,482,591.6667 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 | 661,447,775 | |
| -1 | -661,447,775 |
Let's try dividing by 4:
661,447,775 ÷ 4 = 165,361,943.75
If the quotient is a whole number, then 4 and 165,361,943.75 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 | 661,447,775 | |
| -1 | 661,447,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 31 | 155 | 775 | 853,481 | 4,267,405 | 21,337,025 | 26,457,911 | 132,289,555 | 661,447,775 |
| -1 | -5 | -25 | -31 | -155 | -775 | -853,481 | -4,267,405 | -21,337,025 | -26,457,911 | -132,289,555 | -661,447,775 |
Here are some more numbers to try:
Try the factor calculator