A:
Positive:
1 x 137222155 x 274444313 x 105555565 x 211111107 x 128245535 x 256491391 x 98651973 x 6955
Negative:
-1 x -13722215-5 x -2744443-13 x -1055555-65 x -211111-107 x -128245-535 x -25649-1391 x -9865-1973 x -6955
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 13,722,215, 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 | 13,722,215 | |
| -1 | -13,722,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,722,215.
Example:
1 x 13,722,215 = 13,722,215
and
-1 x -13,722,215 = 13,722,215
Notice both answers equal 13,722,215
With that explanation out of the way, let's continue. Next, we take the number 13,722,215 and divide it by 2:
13,722,215 ÷ 2 = 6,861,107.5
If the quotient is a whole number, then 2 and 6,861,107.5 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 | 13,722,215 | |
| -1 | -13,722,215 |
Now, we try dividing 13,722,215 by 3:
13,722,215 ÷ 3 = 4,574,071.6667
If the quotient is a whole number, then 3 and 4,574,071.6667 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 | 13,722,215 | |
| -1 | -13,722,215 |
Let's try dividing by 4:
13,722,215 ÷ 4 = 3,430,553.75
If the quotient is a whole number, then 4 and 3,430,553.75 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 | 13,722,215 | |
| -1 | 13,722,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 107 | 535 | 1,391 | 1,973 | 6,955 | 9,865 | 25,649 | 128,245 | 211,111 | 1,055,555 | 2,744,443 | 13,722,215 |
| -1 | -5 | -13 | -65 | -107 | -535 | -1,391 | -1,973 | -6,955 | -9,865 | -25,649 | -128,245 | -211,111 | -1,055,555 | -2,744,443 | -13,722,215 |
Here are some more numbers to try:
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