A:
Positive:
1 x 2031250111 x 184659117 x 119485319 x 1069079187 x 108623209 x 97189323 x 628873553 x 5717
Negative:
-1 x -20312501-11 x -1846591-17 x -1194853-19 x -1069079-187 x -108623-209 x -97189-323 x -62887-3553 x -5717
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 20,312,501, 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 | 20,312,501 | |
| -1 | -20,312,501 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,312,501.
Example:
1 x 20,312,501 = 20,312,501
and
-1 x -20,312,501 = 20,312,501
Notice both answers equal 20,312,501
With that explanation out of the way, let's continue. Next, we take the number 20,312,501 and divide it by 2:
20,312,501 ÷ 2 = 10,156,250.5
If the quotient is a whole number, then 2 and 10,156,250.5 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 | 20,312,501 | |
| -1 | -20,312,501 |
Now, we try dividing 20,312,501 by 3:
20,312,501 ÷ 3 = 6,770,833.6667
If the quotient is a whole number, then 3 and 6,770,833.6667 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 | 20,312,501 | |
| -1 | -20,312,501 |
Let's try dividing by 4:
20,312,501 ÷ 4 = 5,078,125.25
If the quotient is a whole number, then 4 and 5,078,125.25 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 | 20,312,501 | |
| -1 | 20,312,501 |
If you did it right, you will end up with this table:
| 1 | 11 | 17 | 19 | 187 | 209 | 323 | 3,553 | 5,717 | 62,887 | 97,189 | 108,623 | 1,069,079 | 1,194,853 | 1,846,591 | 20,312,501 |
| -1 | -11 | -17 | -19 | -187 | -209 | -323 | -3,553 | -5,717 | -62,887 | -97,189 | -108,623 | -1,069,079 | -1,194,853 | -1,846,591 | -20,312,501 |
Here are some more numbers to try:
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