A:
Positive:
1 x 2119432913 x 163033319 x 111549153 x 399893247 x 85807689 x 307611007 x 210471619 x 13091
Negative:
-1 x -21194329-13 x -1630333-19 x -1115491-53 x -399893-247 x -85807-689 x -30761-1007 x -21047-1619 x -13091
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 21,194,329, 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 | 21,194,329 | |
| -1 | -21,194,329 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,194,329.
Example:
1 x 21,194,329 = 21,194,329
and
-1 x -21,194,329 = 21,194,329
Notice both answers equal 21,194,329
With that explanation out of the way, let's continue. Next, we take the number 21,194,329 and divide it by 2:
21,194,329 ÷ 2 = 10,597,164.5
If the quotient is a whole number, then 2 and 10,597,164.5 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 | 21,194,329 | |
| -1 | -21,194,329 |
Now, we try dividing 21,194,329 by 3:
21,194,329 ÷ 3 = 7,064,776.3333
If the quotient is a whole number, then 3 and 7,064,776.3333 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 | 21,194,329 | |
| -1 | -21,194,329 |
Let's try dividing by 4:
21,194,329 ÷ 4 = 5,298,582.25
If the quotient is a whole number, then 4 and 5,298,582.25 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 | 21,194,329 | |
| -1 | 21,194,329 |
If you did it right, you will end up with this table:
| 1 | 13 | 19 | 53 | 247 | 689 | 1,007 | 1,619 | 13,091 | 21,047 | 30,761 | 85,807 | 399,893 | 1,115,491 | 1,630,333 | 21,194,329 |
| -1 | -13 | -19 | -53 | -247 | -689 | -1,007 | -1,619 | -13,091 | -21,047 | -30,761 | -85,807 | -399,893 | -1,115,491 | -1,630,333 | -21,194,329 |
Here are some more numbers to try:
Try the factor calculator