A:
Positive:
1 x 511155555 x 1022311147 x 1087565235 x 217513443 x 115385491 x 1041052215 x 230772455 x 20821
Negative:
-1 x -51115555-5 x -10223111-47 x -1087565-235 x -217513-443 x -115385-491 x -104105-2215 x -23077-2455 x -20821
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 51,115,555, 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 | 51,115,555 | |
| -1 | -51,115,555 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 51,115,555.
Example:
1 x 51,115,555 = 51,115,555
and
-1 x -51,115,555 = 51,115,555
Notice both answers equal 51,115,555
With that explanation out of the way, let's continue. Next, we take the number 51,115,555 and divide it by 2:
51,115,555 ÷ 2 = 25,557,777.5
If the quotient is a whole number, then 2 and 25,557,777.5 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 | 51,115,555 | |
| -1 | -51,115,555 |
Now, we try dividing 51,115,555 by 3:
51,115,555 ÷ 3 = 17,038,518.3333
If the quotient is a whole number, then 3 and 17,038,518.3333 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 | 51,115,555 | |
| -1 | -51,115,555 |
Let's try dividing by 4:
51,115,555 ÷ 4 = 12,778,888.75
If the quotient is a whole number, then 4 and 12,778,888.75 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 | 51,115,555 | |
| -1 | 51,115,555 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 235 | 443 | 491 | 2,215 | 2,455 | 20,821 | 23,077 | 104,105 | 115,385 | 217,513 | 1,087,565 | 10,223,111 | 51,115,555 |
| -1 | -5 | -47 | -235 | -443 | -491 | -2,215 | -2,455 | -20,821 | -23,077 | -104,105 | -115,385 | -217,513 | -1,087,565 | -10,223,111 | -51,115,555 |
Here are some more numbers to try:
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