A:
Positive:
1 x 185416217 x 264880361 x 303961173 x 107177251 x 73871427 x 434231211 x 153111757 x 10553
Negative:
-1 x -18541621-7 x -2648803-61 x -303961-173 x -107177-251 x -73871-427 x -43423-1211 x -15311-1757 x -10553
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 18,541,621, 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 | 18,541,621 | |
| -1 | -18,541,621 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 18,541,621.
Example:
1 x 18,541,621 = 18,541,621
and
-1 x -18,541,621 = 18,541,621
Notice both answers equal 18,541,621
With that explanation out of the way, let's continue. Next, we take the number 18,541,621 and divide it by 2:
18,541,621 ÷ 2 = 9,270,810.5
If the quotient is a whole number, then 2 and 9,270,810.5 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 | 18,541,621 | |
| -1 | -18,541,621 |
Now, we try dividing 18,541,621 by 3:
18,541,621 ÷ 3 = 6,180,540.3333
If the quotient is a whole number, then 3 and 6,180,540.3333 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 | 18,541,621 | |
| -1 | -18,541,621 |
Let's try dividing by 4:
18,541,621 ÷ 4 = 4,635,405.25
If the quotient is a whole number, then 4 and 4,635,405.25 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 | 18,541,621 | |
| -1 | 18,541,621 |
If you did it right, you will end up with this table:
| 1 | 7 | 61 | 173 | 251 | 427 | 1,211 | 1,757 | 10,553 | 15,311 | 43,423 | 73,871 | 107,177 | 303,961 | 2,648,803 | 18,541,621 |
| -1 | -7 | -61 | -173 | -251 | -427 | -1,211 | -1,757 | -10,553 | -15,311 | -43,423 | -73,871 | -107,177 | -303,961 | -2,648,803 | -18,541,621 |
Here are some more numbers to try:
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