A:
Positive:
1 x 195188955 x 390377911 x 177444555 x 354889367 x 53185967 x 201851835 x 106374037 x 4835
Negative:
-1 x -19518895-5 x -3903779-11 x -1774445-55 x -354889-367 x -53185-967 x -20185-1835 x -10637-4037 x -4835
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 19,518,895, 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 | 19,518,895 | |
| -1 | -19,518,895 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 19,518,895.
Example:
1 x 19,518,895 = 19,518,895
and
-1 x -19,518,895 = 19,518,895
Notice both answers equal 19,518,895
With that explanation out of the way, let's continue. Next, we take the number 19,518,895 and divide it by 2:
19,518,895 ÷ 2 = 9,759,447.5
If the quotient is a whole number, then 2 and 9,759,447.5 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 | 19,518,895 | |
| -1 | -19,518,895 |
Now, we try dividing 19,518,895 by 3:
19,518,895 ÷ 3 = 6,506,298.3333
If the quotient is a whole number, then 3 and 6,506,298.3333 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 | 19,518,895 | |
| -1 | -19,518,895 |
Let's try dividing by 4:
19,518,895 ÷ 4 = 4,879,723.75
If the quotient is a whole number, then 4 and 4,879,723.75 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 | 19,518,895 | |
| -1 | 19,518,895 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 367 | 967 | 1,835 | 4,037 | 4,835 | 10,637 | 20,185 | 53,185 | 354,889 | 1,774,445 | 3,903,779 | 19,518,895 |
| -1 | -5 | -11 | -55 | -367 | -967 | -1,835 | -4,037 | -4,835 | -10,637 | -20,185 | -53,185 | -354,889 | -1,774,445 | -3,903,779 | -19,518,895 |
Here are some more numbers to try:
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