A:
Positive:
1 x 2190370117 x 128845331 x 70657189 x 246109467 x 46903527 x 415631513 x 144772759 x 7939
Negative:
-1 x -21903701-17 x -1288453-31 x -706571-89 x -246109-467 x -46903-527 x -41563-1513 x -14477-2759 x -7939
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 21,903,701, 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 | 21,903,701 | |
| -1 | -21,903,701 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,903,701.
Example:
1 x 21,903,701 = 21,903,701
and
-1 x -21,903,701 = 21,903,701
Notice both answers equal 21,903,701
With that explanation out of the way, let's continue. Next, we take the number 21,903,701 and divide it by 2:
21,903,701 ÷ 2 = 10,951,850.5
If the quotient is a whole number, then 2 and 10,951,850.5 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 | 21,903,701 | |
| -1 | -21,903,701 |
Now, we try dividing 21,903,701 by 3:
21,903,701 ÷ 3 = 7,301,233.6667
If the quotient is a whole number, then 3 and 7,301,233.6667 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 | 21,903,701 | |
| -1 | -21,903,701 |
Let's try dividing by 4:
21,903,701 ÷ 4 = 5,475,925.25
If the quotient is a whole number, then 4 and 5,475,925.25 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 | 21,903,701 | |
| -1 | 21,903,701 |
If you did it right, you will end up with this table:
| 1 | 17 | 31 | 89 | 467 | 527 | 1,513 | 2,759 | 7,939 | 14,477 | 41,563 | 46,903 | 246,109 | 706,571 | 1,288,453 | 21,903,701 |
| -1 | -17 | -31 | -89 | -467 | -527 | -1,513 | -2,759 | -7,939 | -14,477 | -41,563 | -46,903 | -246,109 | -706,571 | -1,288,453 | -21,903,701 |
Here are some more numbers to try:
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