Q: What are the factor combinations of the number 643,614,155?
A:
Positive:
1 x 6436141555 x 128722831
Negative:
-1 x -643614155-5 x -128722831
A:
Positive:
1 x 6436141555 x 128722831
Negative:
-1 x -643614155-5 x -128722831
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 643,614,155, 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 | 643,614,155 | |
-1 | -643,614,155 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 643,614,155.
Example:
1 x 643,614,155 = 643,614,155
and
-1 x -643,614,155 = 643,614,155
Notice both answers equal 643,614,155
With that explanation out of the way, let's continue. Next, we take the number 643,614,155 and divide it by 2:
643,614,155 ÷ 2 = 321,807,077.5
If the quotient is a whole number, then 2 and 321,807,077.5 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 | 643,614,155 | |
-1 | -643,614,155 |
Now, we try dividing 643,614,155 by 3:
643,614,155 ÷ 3 = 214,538,051.6667
If the quotient is a whole number, then 3 and 214,538,051.6667 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 | 643,614,155 | |
-1 | -643,614,155 |
Let's try dividing by 4:
643,614,155 ÷ 4 = 160,903,538.75
If the quotient is a whole number, then 4 and 160,903,538.75 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 | 643,614,155 | |
-1 | 643,614,155 |
If you did it right, you will end up with this table:
1 | 5 | 128,722,831 | 643,614,155 |
-1 | -5 | -128,722,831 | -643,614,155 |
Here are some more numbers to try:
Try the factor calculator