A:
Positive:
1 x 217887955 x 43577597 x 311268535 x 622537373 x 584151669 x 130551865 x 116832611 x 8345
Negative:
-1 x -21788795-5 x -4357759-7 x -3112685-35 x -622537-373 x -58415-1669 x -13055-1865 x -11683-2611 x -8345
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 21,788,795, 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 | 21,788,795 | |
| -1 | -21,788,795 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,788,795.
Example:
1 x 21,788,795 = 21,788,795
and
-1 x -21,788,795 = 21,788,795
Notice both answers equal 21,788,795
With that explanation out of the way, let's continue. Next, we take the number 21,788,795 and divide it by 2:
21,788,795 ÷ 2 = 10,894,397.5
If the quotient is a whole number, then 2 and 10,894,397.5 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 | 21,788,795 | |
| -1 | -21,788,795 |
Now, we try dividing 21,788,795 by 3:
21,788,795 ÷ 3 = 7,262,931.6667
If the quotient is a whole number, then 3 and 7,262,931.6667 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 | 21,788,795 | |
| -1 | -21,788,795 |
Let's try dividing by 4:
21,788,795 ÷ 4 = 5,447,198.75
If the quotient is a whole number, then 4 and 5,447,198.75 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 | 21,788,795 | |
| -1 | 21,788,795 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 373 | 1,669 | 1,865 | 2,611 | 8,345 | 11,683 | 13,055 | 58,415 | 622,537 | 3,112,685 | 4,357,759 | 21,788,795 |
| -1 | -5 | -7 | -35 | -373 | -1,669 | -1,865 | -2,611 | -8,345 | -11,683 | -13,055 | -58,415 | -622,537 | -3,112,685 | -4,357,759 | -21,788,795 |
Here are some more numbers to try:
Try the factor calculator