A:
Positive:
1 x 125451555 x 25090317 x 179216535 x 358433227 x 552651135 x 110531579 x 79451589 x 7895
Negative:
-1 x -12545155-5 x -2509031-7 x -1792165-35 x -358433-227 x -55265-1135 x -11053-1579 x -7945-1589 x -7895
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 12,545,155, 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 | 12,545,155 | |
| -1 | -12,545,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,545,155.
Example:
1 x 12,545,155 = 12,545,155
and
-1 x -12,545,155 = 12,545,155
Notice both answers equal 12,545,155
With that explanation out of the way, let's continue. Next, we take the number 12,545,155 and divide it by 2:
12,545,155 ÷ 2 = 6,272,577.5
If the quotient is a whole number, then 2 and 6,272,577.5 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 | 12,545,155 | |
| -1 | -12,545,155 |
Now, we try dividing 12,545,155 by 3:
12,545,155 ÷ 3 = 4,181,718.3333
If the quotient is a whole number, then 3 and 4,181,718.3333 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 | 12,545,155 | |
| -1 | -12,545,155 |
Let's try dividing by 4:
12,545,155 ÷ 4 = 3,136,288.75
If the quotient is a whole number, then 4 and 3,136,288.75 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 | 12,545,155 | |
| -1 | 12,545,155 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 227 | 1,135 | 1,579 | 1,589 | 7,895 | 7,945 | 11,053 | 55,265 | 358,433 | 1,792,165 | 2,509,031 | 12,545,155 |
| -1 | -5 | -7 | -35 | -227 | -1,135 | -1,579 | -1,589 | -7,895 | -7,945 | -11,053 | -55,265 | -358,433 | -1,792,165 | -2,509,031 | -12,545,155 |
Here are some more numbers to try:
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