A:
Positive:
1 x 151225255 x 302450511 x 137477525 x 60490155 x 274955127 x 119075275 x 54991433 x 34925635 x 238151397 x 108252165 x 69853175 x 4763
Negative:
-1 x -15122525-5 x -3024505-11 x -1374775-25 x -604901-55 x -274955-127 x -119075-275 x -54991-433 x -34925-635 x -23815-1397 x -10825-2165 x -6985-3175 x -4763
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 15,122,525, 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 | 15,122,525 | |
| -1 | -15,122,525 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,122,525.
Example:
1 x 15,122,525 = 15,122,525
and
-1 x -15,122,525 = 15,122,525
Notice both answers equal 15,122,525
With that explanation out of the way, let's continue. Next, we take the number 15,122,525 and divide it by 2:
15,122,525 ÷ 2 = 7,561,262.5
If the quotient is a whole number, then 2 and 7,561,262.5 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 | 15,122,525 | |
| -1 | -15,122,525 |
Now, we try dividing 15,122,525 by 3:
15,122,525 ÷ 3 = 5,040,841.6667
If the quotient is a whole number, then 3 and 5,040,841.6667 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 | 15,122,525 | |
| -1 | -15,122,525 |
Let's try dividing by 4:
15,122,525 ÷ 4 = 3,780,631.25
If the quotient is a whole number, then 4 and 3,780,631.25 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 | 15,122,525 | |
| -1 | 15,122,525 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 25 | 55 | 127 | 275 | 433 | 635 | 1,397 | 2,165 | 3,175 | 4,763 | 6,985 | 10,825 | 23,815 | 34,925 | 54,991 | 119,075 | 274,955 | 604,901 | 1,374,775 | 3,024,505 | 15,122,525 |
| -1 | -5 | -11 | -25 | -55 | -127 | -275 | -433 | -635 | -1,397 | -2,165 | -3,175 | -4,763 | -6,985 | -10,825 | -23,815 | -34,925 | -54,991 | -119,075 | -274,955 | -604,901 | -1,374,775 | -3,024,505 | -15,122,525 |
Here are some more numbers to try:
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