A:
Positive:
1 x 195617455 x 39123497 x 279453535 x 55890759 x 331555295 x 66311413 x 473652065 x 9473
Negative:
-1 x -19561745-5 x -3912349-7 x -2794535-35 x -558907-59 x -331555-295 x -66311-413 x -47365-2065 x -9473
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 19,561,745, 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 | 19,561,745 | |
| -1 | -19,561,745 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,561,745.
Example:
1 x 19,561,745 = 19,561,745
and
-1 x -19,561,745 = 19,561,745
Notice both answers equal 19,561,745
With that explanation out of the way, let's continue. Next, we take the number 19,561,745 and divide it by 2:
19,561,745 ÷ 2 = 9,780,872.5
If the quotient is a whole number, then 2 and 9,780,872.5 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 | 19,561,745 | |
| -1 | -19,561,745 |
Now, we try dividing 19,561,745 by 3:
19,561,745 ÷ 3 = 6,520,581.6667
If the quotient is a whole number, then 3 and 6,520,581.6667 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 | 19,561,745 | |
| -1 | -19,561,745 |
Let's try dividing by 4:
19,561,745 ÷ 4 = 4,890,436.25
If the quotient is a whole number, then 4 and 4,890,436.25 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 | 19,561,745 | |
| -1 | 19,561,745 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 59 | 295 | 413 | 2,065 | 9,473 | 47,365 | 66,311 | 331,555 | 558,907 | 2,794,535 | 3,912,349 | 19,561,745 |
| -1 | -5 | -7 | -35 | -59 | -295 | -413 | -2,065 | -9,473 | -47,365 | -66,311 | -331,555 | -558,907 | -2,794,535 | -3,912,349 | -19,561,745 |
Here are some more numbers to try:
Try the factor calculator