Q: What are the factor combinations of the number 820,185,287?
A:
Positive:
1 x 820185287409 x 2005343
Negative:
-1 x -820185287-409 x -2005343
A:
Positive:
1 x 820185287409 x 2005343
Negative:
-1 x -820185287-409 x -2005343
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 820,185,287, 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 | 820,185,287 | |
-1 | -820,185,287 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 820,185,287.
Example:
1 x 820,185,287 = 820,185,287
and
-1 x -820,185,287 = 820,185,287
Notice both answers equal 820,185,287
With that explanation out of the way, let's continue. Next, we take the number 820,185,287 and divide it by 2:
820,185,287 ÷ 2 = 410,092,643.5
If the quotient is a whole number, then 2 and 410,092,643.5 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 | 820,185,287 | |
-1 | -820,185,287 |
Now, we try dividing 820,185,287 by 3:
820,185,287 ÷ 3 = 273,395,095.6667
If the quotient is a whole number, then 3 and 273,395,095.6667 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 | 820,185,287 | |
-1 | -820,185,287 |
Let's try dividing by 4:
820,185,287 ÷ 4 = 205,046,321.75
If the quotient is a whole number, then 4 and 205,046,321.75 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 | 820,185,287 | |
-1 | 820,185,287 |
If you did it right, you will end up with this table:
1 | 409 | 2,005,343 | 820,185,287 |
-1 | -409 | -2,005,343 | -820,185,287 |
Here are some more numbers to try:
Try the factor calculator