A:
Positive:
1 x 152070255 x 304140523 x 66117525 x 60828153 x 286925115 x 132235265 x 57385499 x 30475575 x 264471219 x 124751325 x 114772495 x 6095
Negative:
-1 x -15207025-5 x -3041405-23 x -661175-25 x -608281-53 x -286925-115 x -132235-265 x -57385-499 x -30475-575 x -26447-1219 x -12475-1325 x -11477-2495 x -6095
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 15,207,025, 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 | 15,207,025 | |
| -1 | -15,207,025 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 15,207,025.
Example:
1 x 15,207,025 = 15,207,025
and
-1 x -15,207,025 = 15,207,025
Notice both answers equal 15,207,025
With that explanation out of the way, let's continue. Next, we take the number 15,207,025 and divide it by 2:
15,207,025 ÷ 2 = 7,603,512.5
If the quotient is a whole number, then 2 and 7,603,512.5 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 | 15,207,025 | |
| -1 | -15,207,025 |
Now, we try dividing 15,207,025 by 3:
15,207,025 ÷ 3 = 5,069,008.3333
If the quotient is a whole number, then 3 and 5,069,008.3333 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 | 15,207,025 | |
| -1 | -15,207,025 |
Let's try dividing by 4:
15,207,025 ÷ 4 = 3,801,756.25
If the quotient is a whole number, then 4 and 3,801,756.25 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 | 15,207,025 | |
| -1 | 15,207,025 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 25 | 53 | 115 | 265 | 499 | 575 | 1,219 | 1,325 | 2,495 | 6,095 | 11,477 | 12,475 | 26,447 | 30,475 | 57,385 | 132,235 | 286,925 | 608,281 | 661,175 | 3,041,405 | 15,207,025 |
| -1 | -5 | -23 | -25 | -53 | -115 | -265 | -499 | -575 | -1,219 | -1,325 | -2,495 | -6,095 | -11,477 | -12,475 | -26,447 | -30,475 | -57,385 | -132,235 | -286,925 | -608,281 | -661,175 | -3,041,405 | -15,207,025 |
Here are some more numbers to try:
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