A:
Positive:
1 x 781517755 x 1563035513 x 601167525 x 312607131 x 252102565 x 1202335155 x 504205325 x 240467403 x 193925775 x 1008412015 x 387857757 x 10075
Negative:
-1 x -78151775-5 x -15630355-13 x -6011675-25 x -3126071-31 x -2521025-65 x -1202335-155 x -504205-325 x -240467-403 x -193925-775 x -100841-2015 x -38785-7757 x -10075
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 78,151,775, 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 | 78,151,775 | |
| -1 | -78,151,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 78,151,775.
Example:
1 x 78,151,775 = 78,151,775
and
-1 x -78,151,775 = 78,151,775
Notice both answers equal 78,151,775
With that explanation out of the way, let's continue. Next, we take the number 78,151,775 and divide it by 2:
78,151,775 ÷ 2 = 39,075,887.5
If the quotient is a whole number, then 2 and 39,075,887.5 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 | 78,151,775 | |
| -1 | -78,151,775 |
Now, we try dividing 78,151,775 by 3:
78,151,775 ÷ 3 = 26,050,591.6667
If the quotient is a whole number, then 3 and 26,050,591.6667 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 | 78,151,775 | |
| -1 | -78,151,775 |
Let's try dividing by 4:
78,151,775 ÷ 4 = 19,537,943.75
If the quotient is a whole number, then 4 and 19,537,943.75 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 | 78,151,775 | |
| -1 | 78,151,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 31 | 65 | 155 | 325 | 403 | 775 | 2,015 | 7,757 | 10,075 | 38,785 | 100,841 | 193,925 | 240,467 | 504,205 | 1,202,335 | 2,521,025 | 3,126,071 | 6,011,675 | 15,630,355 | 78,151,775 |
| -1 | -5 | -13 | -25 | -31 | -65 | -155 | -325 | -403 | -775 | -2,015 | -7,757 | -10,075 | -38,785 | -100,841 | -193,925 | -240,467 | -504,205 | -1,202,335 | -2,521,025 | -3,126,071 | -6,011,675 | -15,630,355 | -78,151,775 |
Here are some more numbers to try:
Try the factor calculator