A:
Positive:
1 x 655387855 x 1310775713 x 504144565 x 1008289191 x 343135955 x 686272483 x 263955279 x 12415
Negative:
-1 x -65538785-5 x -13107757-13 x -5041445-65 x -1008289-191 x -343135-955 x -68627-2483 x -26395-5279 x -12415
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 65,538,785, 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 | 65,538,785 | |
| -1 | -65,538,785 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 65,538,785.
Example:
1 x 65,538,785 = 65,538,785
and
-1 x -65,538,785 = 65,538,785
Notice both answers equal 65,538,785
With that explanation out of the way, let's continue. Next, we take the number 65,538,785 and divide it by 2:
65,538,785 ÷ 2 = 32,769,392.5
If the quotient is a whole number, then 2 and 32,769,392.5 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 | 65,538,785 | |
| -1 | -65,538,785 |
Now, we try dividing 65,538,785 by 3:
65,538,785 ÷ 3 = 21,846,261.6667
If the quotient is a whole number, then 3 and 21,846,261.6667 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 | 65,538,785 | |
| -1 | -65,538,785 |
Let's try dividing by 4:
65,538,785 ÷ 4 = 16,384,696.25
If the quotient is a whole number, then 4 and 16,384,696.25 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 | 65,538,785 | |
| -1 | 65,538,785 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 191 | 955 | 2,483 | 5,279 | 12,415 | 26,395 | 68,627 | 343,135 | 1,008,289 | 5,041,445 | 13,107,757 | 65,538,785 |
| -1 | -5 | -13 | -65 | -191 | -955 | -2,483 | -5,279 | -12,415 | -26,395 | -68,627 | -343,135 | -1,008,289 | -5,041,445 | -13,107,757 | -65,538,785 |
Here are some more numbers to try:
Try the factor calculator