Q: What are the factor combinations of the number 720,521,154?

 A:
Positive:   1 x 7205211542 x 3602605773 x 2401737186 x 1200868599 x 8005790618 x 4002895319 x 3792216638 x 1896108357 x 12640722114 x 6320361171 x 4213574227 x 3174102342 x 2106787454 x 1587051681 x 10580341362 x 5290172043 x 3526784086 x 1763394313 x 1670588626 x 835299281 x 7763412939 x 5568618562 x 3881725878 x 27843
Negative: -1 x -720521154-2 x -360260577-3 x -240173718-6 x -120086859-9 x -80057906-18 x -40028953-19 x -37922166-38 x -18961083-57 x -12640722-114 x -6320361-171 x -4213574-227 x -3174102-342 x -2106787-454 x -1587051-681 x -1058034-1362 x -529017-2043 x -352678-4086 x -176339-4313 x -167058-8626 x -83529-9281 x -77634-12939 x -55686-18562 x -38817-25878 x -27843


How do I find the factor combinations of the number 720,521,154?

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 720,521,154, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

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.

1 720,521,154
-1 -720,521,154

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 720,521,154.

Example:
1 x 720,521,154 = 720,521,154
and
-1 x -720,521,154 = 720,521,154
Notice both answers equal 720,521,154

With that explanation out of the way, let's continue. Next, we take the number 720,521,154 and divide it by 2:

720,521,154 ÷ 2 = 360,260,577

If the quotient is a whole number, then 2 and 360,260,577 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 360,260,577 720,521,154
-1 -2 -360,260,577 -720,521,154

Now, we try dividing 720,521,154 by 3:

720,521,154 ÷ 3 = 240,173,718

If the quotient is a whole number, then 3 and 240,173,718 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 3 240,173,718 360,260,577 720,521,154
-1 -2 -3 -240,173,718 -360,260,577 -720,521,154

Let's try dividing by 4:

720,521,154 ÷ 4 = 180,130,288.5

If the quotient is a whole number, then 4 and 180,130,288.5 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 2 3 240,173,718 360,260,577 720,521,154
-1 -2 -3 -240,173,718 -360,260,577 720,521,154
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

12369181938571141712273424546811,3622,0434,0864,3138,6269,28112,93918,56225,87827,84338,81755,68677,63483,529167,058176,339352,678529,0171,058,0341,587,0512,106,7873,174,1024,213,5746,320,36112,640,72218,961,08337,922,16640,028,95380,057,906120,086,859240,173,718360,260,577720,521,154
-1-2-3-6-9-18-19-38-57-114-171-227-342-454-681-1,362-2,043-4,086-4,313-8,626-9,281-12,939-18,562-25,878-27,843-38,817-55,686-77,634-83,529-167,058-176,339-352,678-529,017-1,058,034-1,587,051-2,106,787-3,174,102-4,213,574-6,320,361-12,640,722-18,961,083-37,922,166-40,028,953-80,057,906-120,086,859-240,173,718-360,260,577-720,521,154

More Examples

Here are some more numbers to try:

720,521,152720,521,153720,521,155720,521,156
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