A:
Positive:
1 x 102204055 x 204408113 x 78618565 x 15723797 x 105365485 x 210731261 x 81051621 x 6305
Negative:
-1 x -10220405-5 x -2044081-13 x -786185-65 x -157237-97 x -105365-485 x -21073-1261 x -8105-1621 x -6305
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 10,220,405, 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 | 10,220,405 | |
| -1 | -10,220,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 10,220,405.
Example:
1 x 10,220,405 = 10,220,405
and
-1 x -10,220,405 = 10,220,405
Notice both answers equal 10,220,405
With that explanation out of the way, let's continue. Next, we take the number 10,220,405 and divide it by 2:
10,220,405 ÷ 2 = 5,110,202.5
If the quotient is a whole number, then 2 and 5,110,202.5 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 | 10,220,405 | |
| -1 | -10,220,405 |
Now, we try dividing 10,220,405 by 3:
10,220,405 ÷ 3 = 3,406,801.6667
If the quotient is a whole number, then 3 and 3,406,801.6667 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 | 10,220,405 | |
| -1 | -10,220,405 |
Let's try dividing by 4:
10,220,405 ÷ 4 = 2,555,101.25
If the quotient is a whole number, then 4 and 2,555,101.25 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 | 10,220,405 | |
| -1 | 10,220,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 97 | 485 | 1,261 | 1,621 | 6,305 | 8,105 | 21,073 | 105,365 | 157,237 | 786,185 | 2,044,081 | 10,220,405 |
| -1 | -5 | -13 | -65 | -97 | -485 | -1,261 | -1,621 | -6,305 | -8,105 | -21,073 | -105,365 | -157,237 | -786,185 | -2,044,081 | -10,220,405 |
Here are some more numbers to try:
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