A:
Positive:
1 x 285512055 x 571024119 x 150269595 x 300539271 x 1053551109 x 257451355 x 210715149 x 5545
Negative:
-1 x -28551205-5 x -5710241-19 x -1502695-95 x -300539-271 x -105355-1109 x -25745-1355 x -21071-5149 x -5545
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 28,551,205, 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 | 28,551,205 | |
| -1 | -28,551,205 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 28,551,205.
Example:
1 x 28,551,205 = 28,551,205
and
-1 x -28,551,205 = 28,551,205
Notice both answers equal 28,551,205
With that explanation out of the way, let's continue. Next, we take the number 28,551,205 and divide it by 2:
28,551,205 ÷ 2 = 14,275,602.5
If the quotient is a whole number, then 2 and 14,275,602.5 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 | 28,551,205 | |
| -1 | -28,551,205 |
Now, we try dividing 28,551,205 by 3:
28,551,205 ÷ 3 = 9,517,068.3333
If the quotient is a whole number, then 3 and 9,517,068.3333 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 | 28,551,205 | |
| -1 | -28,551,205 |
Let's try dividing by 4:
28,551,205 ÷ 4 = 7,137,801.25
If the quotient is a whole number, then 4 and 7,137,801.25 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 | 28,551,205 | |
| -1 | 28,551,205 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 271 | 1,109 | 1,355 | 5,149 | 5,545 | 21,071 | 25,745 | 105,355 | 300,539 | 1,502,695 | 5,710,241 | 28,551,205 |
| -1 | -5 | -19 | -95 | -271 | -1,109 | -1,355 | -5,149 | -5,545 | -21,071 | -25,745 | -105,355 | -300,539 | -1,502,695 | -5,710,241 | -28,551,205 |
Here are some more numbers to try:
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