A:
Positive:
1 x 211845255 x 423690519 x 111497525 x 84738195 x 222995103 x 205675433 x 48925475 x 44599515 x 411351957 x 108252165 x 97852575 x 8227
Negative:
-1 x -21184525-5 x -4236905-19 x -1114975-25 x -847381-95 x -222995-103 x -205675-433 x -48925-475 x -44599-515 x -41135-1957 x -10825-2165 x -9785-2575 x -8227
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 21,184,525, 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 | 21,184,525 | |
| -1 | -21,184,525 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,184,525.
Example:
1 x 21,184,525 = 21,184,525
and
-1 x -21,184,525 = 21,184,525
Notice both answers equal 21,184,525
With that explanation out of the way, let's continue. Next, we take the number 21,184,525 and divide it by 2:
21,184,525 ÷ 2 = 10,592,262.5
If the quotient is a whole number, then 2 and 10,592,262.5 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 | 21,184,525 | |
| -1 | -21,184,525 |
Now, we try dividing 21,184,525 by 3:
21,184,525 ÷ 3 = 7,061,508.3333
If the quotient is a whole number, then 3 and 7,061,508.3333 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 | 21,184,525 | |
| -1 | -21,184,525 |
Let's try dividing by 4:
21,184,525 ÷ 4 = 5,296,131.25
If the quotient is a whole number, then 4 and 5,296,131.25 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 | 21,184,525 | |
| -1 | 21,184,525 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 25 | 95 | 103 | 433 | 475 | 515 | 1,957 | 2,165 | 2,575 | 8,227 | 9,785 | 10,825 | 41,135 | 44,599 | 48,925 | 205,675 | 222,995 | 847,381 | 1,114,975 | 4,236,905 | 21,184,525 |
| -1 | -5 | -19 | -25 | -95 | -103 | -433 | -475 | -515 | -1,957 | -2,165 | -2,575 | -8,227 | -9,785 | -10,825 | -41,135 | -44,599 | -48,925 | -205,675 | -222,995 | -847,381 | -1,114,975 | -4,236,905 | -21,184,525 |
Here are some more numbers to try:
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