A:
Positive:
1 x 1512052155 x 302410437 x 2160074535 x 432014989 x 1698935445 x 339787623 x 2427053115 x 48541
Negative:
-1 x -151205215-5 x -30241043-7 x -21600745-35 x -4320149-89 x -1698935-445 x -339787-623 x -242705-3115 x -48541
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 151,205,215, 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 | 151,205,215 | |
| -1 | -151,205,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 151,205,215.
Example:
1 x 151,205,215 = 151,205,215
and
-1 x -151,205,215 = 151,205,215
Notice both answers equal 151,205,215
With that explanation out of the way, let's continue. Next, we take the number 151,205,215 and divide it by 2:
151,205,215 ÷ 2 = 75,602,607.5
If the quotient is a whole number, then 2 and 75,602,607.5 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 | 151,205,215 | |
| -1 | -151,205,215 |
Now, we try dividing 151,205,215 by 3:
151,205,215 ÷ 3 = 50,401,738.3333
If the quotient is a whole number, then 3 and 50,401,738.3333 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 | 151,205,215 | |
| -1 | -151,205,215 |
Let's try dividing by 4:
151,205,215 ÷ 4 = 37,801,303.75
If the quotient is a whole number, then 4 and 37,801,303.75 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 | 151,205,215 | |
| -1 | 151,205,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 89 | 445 | 623 | 3,115 | 48,541 | 242,705 | 339,787 | 1,698,935 | 4,320,149 | 21,600,745 | 30,241,043 | 151,205,215 |
| -1 | -5 | -7 | -35 | -89 | -445 | -623 | -3,115 | -48,541 | -242,705 | -339,787 | -1,698,935 | -4,320,149 | -21,600,745 | -30,241,043 | -151,205,215 |
Here are some more numbers to try:
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