A:
Positive:
1 x 213114955 x 426229983 x 25676589 x 239455415 x 51353445 x 47891577 x 369352885 x 7387
Negative:
-1 x -21311495-5 x -4262299-83 x -256765-89 x -239455-415 x -51353-445 x -47891-577 x -36935-2885 x -7387
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 21,311,495, 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 | 21,311,495 | |
| -1 | -21,311,495 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,311,495.
Example:
1 x 21,311,495 = 21,311,495
and
-1 x -21,311,495 = 21,311,495
Notice both answers equal 21,311,495
With that explanation out of the way, let's continue. Next, we take the number 21,311,495 and divide it by 2:
21,311,495 ÷ 2 = 10,655,747.5
If the quotient is a whole number, then 2 and 10,655,747.5 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 | 21,311,495 | |
| -1 | -21,311,495 |
Now, we try dividing 21,311,495 by 3:
21,311,495 ÷ 3 = 7,103,831.6667
If the quotient is a whole number, then 3 and 7,103,831.6667 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 | 21,311,495 | |
| -1 | -21,311,495 |
Let's try dividing by 4:
21,311,495 ÷ 4 = 5,327,873.75
If the quotient is a whole number, then 4 and 5,327,873.75 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 | 21,311,495 | |
| -1 | 21,311,495 |
If you did it right, you will end up with this table:
| 1 | 5 | 83 | 89 | 415 | 445 | 577 | 2,885 | 7,387 | 36,935 | 47,891 | 51,353 | 239,455 | 256,765 | 4,262,299 | 21,311,495 |
| -1 | -5 | -83 | -89 | -415 | -445 | -577 | -2,885 | -7,387 | -36,935 | -47,891 | -51,353 | -239,455 | -256,765 | -4,262,299 | -21,311,495 |
Here are some more numbers to try:
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