A:
Positive:
1 x 204165017 x 291664353 x 385217113 x 180677371 x 55031487 x 41923791 x 258113409 x 5989
Negative:
-1 x -20416501-7 x -2916643-53 x -385217-113 x -180677-371 x -55031-487 x -41923-791 x -25811-3409 x -5989
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 20,416,501, 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 | 20,416,501 | |
| -1 | -20,416,501 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,416,501.
Example:
1 x 20,416,501 = 20,416,501
and
-1 x -20,416,501 = 20,416,501
Notice both answers equal 20,416,501
With that explanation out of the way, let's continue. Next, we take the number 20,416,501 and divide it by 2:
20,416,501 ÷ 2 = 10,208,250.5
If the quotient is a whole number, then 2 and 10,208,250.5 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 | 20,416,501 | |
| -1 | -20,416,501 |
Now, we try dividing 20,416,501 by 3:
20,416,501 ÷ 3 = 6,805,500.3333
If the quotient is a whole number, then 3 and 6,805,500.3333 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 | 20,416,501 | |
| -1 | -20,416,501 |
Let's try dividing by 4:
20,416,501 ÷ 4 = 5,104,125.25
If the quotient is a whole number, then 4 and 5,104,125.25 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 | 20,416,501 | |
| -1 | 20,416,501 |
If you did it right, you will end up with this table:
| 1 | 7 | 53 | 113 | 371 | 487 | 791 | 3,409 | 5,989 | 25,811 | 41,923 | 55,031 | 180,677 | 385,217 | 2,916,643 | 20,416,501 |
| -1 | -7 | -53 | -113 | -371 | -487 | -791 | -3,409 | -5,989 | -25,811 | -41,923 | -55,031 | -180,677 | -385,217 | -2,916,643 | -20,416,501 |
Here are some more numbers to try:
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