A:
Positive:
1 x 219393655 x 43878737 x 313419535 x 62683947 x 466795235 x 93359329 x 666851645 x 13337
Negative:
-1 x -21939365-5 x -4387873-7 x -3134195-35 x -626839-47 x -466795-235 x -93359-329 x -66685-1645 x -13337
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 21,939,365, 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 | 21,939,365 | |
| -1 | -21,939,365 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,939,365.
Example:
1 x 21,939,365 = 21,939,365
and
-1 x -21,939,365 = 21,939,365
Notice both answers equal 21,939,365
With that explanation out of the way, let's continue. Next, we take the number 21,939,365 and divide it by 2:
21,939,365 ÷ 2 = 10,969,682.5
If the quotient is a whole number, then 2 and 10,969,682.5 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 | 21,939,365 | |
| -1 | -21,939,365 |
Now, we try dividing 21,939,365 by 3:
21,939,365 ÷ 3 = 7,313,121.6667
If the quotient is a whole number, then 3 and 7,313,121.6667 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 | 21,939,365 | |
| -1 | -21,939,365 |
Let's try dividing by 4:
21,939,365 ÷ 4 = 5,484,841.25
If the quotient is a whole number, then 4 and 5,484,841.25 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 | 21,939,365 | |
| -1 | 21,939,365 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 47 | 235 | 329 | 1,645 | 13,337 | 66,685 | 93,359 | 466,795 | 626,839 | 3,134,195 | 4,387,873 | 21,939,365 |
| -1 | -5 | -7 | -35 | -47 | -235 | -329 | -1,645 | -13,337 | -66,685 | -93,359 | -466,795 | -626,839 | -3,134,195 | -4,387,873 | -21,939,365 |
Here are some more numbers to try:
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