A:
Positive:
1 x 19647890911 x 1786171959 x 3330151131 x 1499839649 x 3027411441 x 1363492311 x 850197729 x 25421
Negative:
-1 x -196478909-11 x -17861719-59 x -3330151-131 x -1499839-649 x -302741-1441 x -136349-2311 x -85019-7729 x -25421
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 196,478,909, 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 | 196,478,909 | |
| -1 | -196,478,909 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 196,478,909.
Example:
1 x 196,478,909 = 196,478,909
and
-1 x -196,478,909 = 196,478,909
Notice both answers equal 196,478,909
With that explanation out of the way, let's continue. Next, we take the number 196,478,909 and divide it by 2:
196,478,909 ÷ 2 = 98,239,454.5
If the quotient is a whole number, then 2 and 98,239,454.5 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 | 196,478,909 | |
| -1 | -196,478,909 |
Now, we try dividing 196,478,909 by 3:
196,478,909 ÷ 3 = 65,492,969.6667
If the quotient is a whole number, then 3 and 65,492,969.6667 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 | 196,478,909 | |
| -1 | -196,478,909 |
Let's try dividing by 4:
196,478,909 ÷ 4 = 49,119,727.25
If the quotient is a whole number, then 4 and 49,119,727.25 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 | 196,478,909 | |
| -1 | 196,478,909 |
If you did it right, you will end up with this table:
| 1 | 11 | 59 | 131 | 649 | 1,441 | 2,311 | 7,729 | 25,421 | 85,019 | 136,349 | 302,741 | 1,499,839 | 3,330,151 | 17,861,719 | 196,478,909 |
| -1 | -11 | -59 | -131 | -649 | -1,441 | -2,311 | -7,729 | -25,421 | -85,019 | -136,349 | -302,741 | -1,499,839 | -3,330,151 | -17,861,719 | -196,478,909 |
Here are some more numbers to try:
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