A:
Positive:
1 x 1551301255 x 3102602525 x 620520567 x 2315375125 x 1241041335 x 4630751675 x 926158375 x 18523
Negative:
-1 x -155130125-5 x -31026025-25 x -6205205-67 x -2315375-125 x -1241041-335 x -463075-1675 x -92615-8375 x -18523
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 155,130,125, 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 | 155,130,125 | |
| -1 | -155,130,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 155,130,125.
Example:
1 x 155,130,125 = 155,130,125
and
-1 x -155,130,125 = 155,130,125
Notice both answers equal 155,130,125
With that explanation out of the way, let's continue. Next, we take the number 155,130,125 and divide it by 2:
155,130,125 ÷ 2 = 77,565,062.5
If the quotient is a whole number, then 2 and 77,565,062.5 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 | 155,130,125 | |
| -1 | -155,130,125 |
Now, we try dividing 155,130,125 by 3:
155,130,125 ÷ 3 = 51,710,041.6667
If the quotient is a whole number, then 3 and 51,710,041.6667 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 | 155,130,125 | |
| -1 | -155,130,125 |
Let's try dividing by 4:
155,130,125 ÷ 4 = 38,782,531.25
If the quotient is a whole number, then 4 and 38,782,531.25 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 | 155,130,125 | |
| -1 | 155,130,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 67 | 125 | 335 | 1,675 | 8,375 | 18,523 | 92,615 | 463,075 | 1,241,041 | 2,315,375 | 6,205,205 | 31,026,025 | 155,130,125 |
| -1 | -5 | -25 | -67 | -125 | -335 | -1,675 | -8,375 | -18,523 | -92,615 | -463,075 | -1,241,041 | -2,315,375 | -6,205,205 | -31,026,025 | -155,130,125 |
Here are some more numbers to try:
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