A:
Positive:
1 x 25511455 x 51022931 x 82295109 x 23405151 x 16895155 x 16459545 x 4681755 x 3379
Negative:
-1 x -2551145-5 x -510229-31 x -82295-109 x -23405-151 x -16895-155 x -16459-545 x -4681-755 x -3379
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 2,551,145, 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 | 2,551,145 | |
| -1 | -2,551,145 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 2,551,145.
Example:
1 x 2,551,145 = 2,551,145
and
-1 x -2,551,145 = 2,551,145
Notice both answers equal 2,551,145
With that explanation out of the way, let's continue. Next, we take the number 2,551,145 and divide it by 2:
2,551,145 ÷ 2 = 1,275,572.5
If the quotient is a whole number, then 2 and 1,275,572.5 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 | 2,551,145 | |
| -1 | -2,551,145 |
Now, we try dividing 2,551,145 by 3:
2,551,145 ÷ 3 = 850,381.6667
If the quotient is a whole number, then 3 and 850,381.6667 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 | 2,551,145 | |
| -1 | -2,551,145 |
Let's try dividing by 4:
2,551,145 ÷ 4 = 637,786.25
If the quotient is a whole number, then 4 and 637,786.25 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 | 2,551,145 | |
| -1 | 2,551,145 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 109 | 151 | 155 | 545 | 755 | 3,379 | 4,681 | 16,459 | 16,895 | 23,405 | 82,295 | 510,229 | 2,551,145 |
| -1 | -5 | -31 | -109 | -151 | -155 | -545 | -755 | -3,379 | -4,681 | -16,459 | -16,895 | -23,405 | -82,295 | -510,229 | -2,551,145 |
Here are some more numbers to try:
Try the factor calculator