A:
Positive:
1 x 1554452155 x 3108904343 x 361500547 x 3307345215 x 723001235 x 6614692021 x 7691510105 x 15383
Negative:
-1 x -155445215-5 x -31089043-43 x -3615005-47 x -3307345-215 x -723001-235 x -661469-2021 x -76915-10105 x -15383
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 155,445,215, 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 | 155,445,215 | |
| -1 | -155,445,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,445,215.
Example:
1 x 155,445,215 = 155,445,215
and
-1 x -155,445,215 = 155,445,215
Notice both answers equal 155,445,215
With that explanation out of the way, let's continue. Next, we take the number 155,445,215 and divide it by 2:
155,445,215 ÷ 2 = 77,722,607.5
If the quotient is a whole number, then 2 and 77,722,607.5 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 | 155,445,215 | |
| -1 | -155,445,215 |
Now, we try dividing 155,445,215 by 3:
155,445,215 ÷ 3 = 51,815,071.6667
If the quotient is a whole number, then 3 and 51,815,071.6667 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 | 155,445,215 | |
| -1 | -155,445,215 |
Let's try dividing by 4:
155,445,215 ÷ 4 = 38,861,303.75
If the quotient is a whole number, then 4 and 38,861,303.75 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 | 155,445,215 | |
| -1 | 155,445,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 47 | 215 | 235 | 2,021 | 10,105 | 15,383 | 76,915 | 661,469 | 723,001 | 3,307,345 | 3,615,005 | 31,089,043 | 155,445,215 |
| -1 | -5 | -43 | -47 | -215 | -235 | -2,021 | -10,105 | -15,383 | -76,915 | -661,469 | -723,001 | -3,307,345 | -3,615,005 | -31,089,043 | -155,445,215 |
Here are some more numbers to try:
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