A:
Positive:
1 x 6160256155 x 12320512341 x 15025015191 x 3225265205 x 3005003955 x 6450537831 x 7866515733 x 39155
Negative:
-1 x -616025615-5 x -123205123-41 x -15025015-191 x -3225265-205 x -3005003-955 x -645053-7831 x -78665-15733 x -39155
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 616,025,615, 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 | 616,025,615 | |
| -1 | -616,025,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 616,025,615.
Example:
1 x 616,025,615 = 616,025,615
and
-1 x -616,025,615 = 616,025,615
Notice both answers equal 616,025,615
With that explanation out of the way, let's continue. Next, we take the number 616,025,615 and divide it by 2:
616,025,615 ÷ 2 = 308,012,807.5
If the quotient is a whole number, then 2 and 308,012,807.5 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 | 616,025,615 | |
| -1 | -616,025,615 |
Now, we try dividing 616,025,615 by 3:
616,025,615 ÷ 3 = 205,341,871.6667
If the quotient is a whole number, then 3 and 205,341,871.6667 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 | 616,025,615 | |
| -1 | -616,025,615 |
Let's try dividing by 4:
616,025,615 ÷ 4 = 154,006,403.75
If the quotient is a whole number, then 4 and 154,006,403.75 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 | 616,025,615 | |
| -1 | 616,025,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 191 | 205 | 955 | 7,831 | 15,733 | 39,155 | 78,665 | 645,053 | 3,005,003 | 3,225,265 | 15,025,015 | 123,205,123 | 616,025,615 |
| -1 | -5 | -41 | -191 | -205 | -955 | -7,831 | -15,733 | -39,155 | -78,665 | -645,053 | -3,005,003 | -3,225,265 | -15,025,015 | -123,205,123 | -616,025,615 |
Here are some more numbers to try:
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