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numtheory

  

tau

  

number of divisors

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

tau(n)

sigma[0] (n)

Parameters

n

-

integer

Description

• 

Important: The numtheory[tau] command has been deprecated.  Use the superseding command NumberTheory[SumOfDivisors] instead.

• 

The function tau(n) will compute the number of positive divisors of n.

• 

The command with(numtheory,tau) allows the use of the abbreviated form of this command.

Examples

withnumtheory:

divisors9

1,3,9

(1)

τ9

3

(2)

divisors1

1

(3)

τ0

0

(4)

τ1

1

(5)

divisors20

1,2,4,5,10,20

(6)

τ20

6

(7)

σ[0]20

6

(8)

See Also

ifactor

ifactors

numtheory[divisors]

numtheory[factorset]

numtheory[sigma]

 


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