The prime factorization of 240 is 2 4×3 1×5 1.
How many positive integer factors (includes composite and prime) does 240 have?
240 has 20 factors.
Here is how the number of factors were calculated:
//In the future enter php code here to demonstrate how to find the number of factors.
The power factor one-dimensional arrays are:
Powers of 2: Array
(
[0] => 1
[1] => 2
[2] => 4
[3] => 8
[4] => 16
)
Powers of 3: Array
(
[0] => 1
[1] => 3
)
Powers of 5: Array
(
[0] => 1
[1] => 5
)
The 20 composite factors of 240 are listed in the array below:
Array
(
[0] => Array
(
[0] => Array
(
[0] => 1
[1] => 5
)
[1] => Array
(
[0] => 3
[1] => 15
)
)
[1] => Array
(
[0] => Array
(
[0] => 2
[1] => 10
)
[1] => Array
(
[0] => 6
[1] => 30
)
)
[2] => Array
(
[0] => Array
(
[0] => 4
[1] => 20
)
[1] => Array
(
[0] => 12
[1] => 60
)
)
[3] => Array
(
[0] => Array
(
[0] => 8
[1] => 40
)
[1] => Array
(
[0] => 24
[1] => 120
)
)
[4] => Array
(
[0] => Array
(
[0] => 16
[1] => 80
)
[1] => Array
(
[0] => 48
[1] => 240
)
)
)
The composite factors listed in the array above are:
1 5 3 15 2 10 6 30 4 20 12 60 8 40 24 120 16 80 48 240
1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240