A:
Positive:
1 x 215222637 x 307460929 x 74214797 x 221879203 x 106021679 x 316971093 x 196912813 x 7651
Negative:
-1 x -21522263-7 x -3074609-29 x -742147-97 x -221879-203 x -106021-679 x -31697-1093 x -19691-2813 x -7651
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 21,522,263, 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 | 21,522,263 | |
| -1 | -21,522,263 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,522,263.
Example:
1 x 21,522,263 = 21,522,263
and
-1 x -21,522,263 = 21,522,263
Notice both answers equal 21,522,263
With that explanation out of the way, let's continue. Next, we take the number 21,522,263 and divide it by 2:
21,522,263 ÷ 2 = 10,761,131.5
If the quotient is a whole number, then 2 and 10,761,131.5 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 | 21,522,263 | |
| -1 | -21,522,263 |
Now, we try dividing 21,522,263 by 3:
21,522,263 ÷ 3 = 7,174,087.6667
If the quotient is a whole number, then 3 and 7,174,087.6667 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 | 21,522,263 | |
| -1 | -21,522,263 |
Let's try dividing by 4:
21,522,263 ÷ 4 = 5,380,565.75
If the quotient is a whole number, then 4 and 5,380,565.75 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 | 21,522,263 | |
| -1 | 21,522,263 |
If you did it right, you will end up with this table:
| 1 | 7 | 29 | 97 | 203 | 679 | 1,093 | 2,813 | 7,651 | 19,691 | 31,697 | 106,021 | 221,879 | 742,147 | 3,074,609 | 21,522,263 |
| -1 | -7 | -29 | -97 | -203 | -679 | -1,093 | -2,813 | -7,651 | -19,691 | -31,697 | -106,021 | -221,879 | -742,147 | -3,074,609 | -21,522,263 |
Here are some more numbers to try:
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