A:
Positive:
1 x 203500577 x 290715113 x 156538991 x 223627113 x 180089791 x 257271469 x 138531979 x 10283
Negative:
-1 x -20350057-7 x -2907151-13 x -1565389-91 x -223627-113 x -180089-791 x -25727-1469 x -13853-1979 x -10283
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 20,350,057, 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 | 20,350,057 | |
| -1 | -20,350,057 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,350,057.
Example:
1 x 20,350,057 = 20,350,057
and
-1 x -20,350,057 = 20,350,057
Notice both answers equal 20,350,057
With that explanation out of the way, let's continue. Next, we take the number 20,350,057 and divide it by 2:
20,350,057 ÷ 2 = 10,175,028.5
If the quotient is a whole number, then 2 and 10,175,028.5 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 | 20,350,057 | |
| -1 | -20,350,057 |
Now, we try dividing 20,350,057 by 3:
20,350,057 ÷ 3 = 6,783,352.3333
If the quotient is a whole number, then 3 and 6,783,352.3333 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 | 20,350,057 | |
| -1 | -20,350,057 |
Let's try dividing by 4:
20,350,057 ÷ 4 = 5,087,514.25
If the quotient is a whole number, then 4 and 5,087,514.25 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 | 20,350,057 | |
| -1 | 20,350,057 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 113 | 791 | 1,469 | 1,979 | 10,283 | 13,853 | 25,727 | 180,089 | 223,627 | 1,565,389 | 2,907,151 | 20,350,057 |
| -1 | -7 | -13 | -91 | -113 | -791 | -1,469 | -1,979 | -10,283 | -13,853 | -25,727 | -180,089 | -223,627 | -1,565,389 | -2,907,151 | -20,350,057 |
Here are some more numbers to try:
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