Divisors of 2016

How many positive divisors does 2016 have?

Details and assumptions

1 and 2016 are considered divisors of 2016.


The answer is 36.

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16 solutions

Observe That :

Prime Factorization of 2016 is \Rightarrow 2 5 × 3 2 × 7 1 2^{5} \times 3^{2} \times 7^{1}

By Divisors of an integer Formula , we get

( 5 + 1 ) ( 2 + 1 ) ( 1 + 1 ) (5+1)(2+1)(1+1) divisors

6 × 3 × 2 6 \times 3 \times 2 divisors

so , 2016 2016 has 36 \boxed{36} positive Divisors

there is any another way without using formula

Nakshtra Maheshwari - 7 years, 7 months ago

Nice link :)

Calvin Lin Staff - 7 years, 7 months ago

Log in to reply

Thanks

Andhika Rahardian - 7 years, 7 months ago

2 \times 3

Neer Muzic - 7 years, 7 months ago

2 (\times 3

Neer Muzic - 7 years, 7 months ago

thank you. now i understand it. before i divide 2016/1 - 2016/42. i spend half an hour on this question

Lukman Mohamad - 7 years, 7 months ago

2 (\times 3)

Neer Muzic - 7 years, 7 months ago
Sayan Ghosh
Nov 3, 2013

2016= 2 5 3 2 7 2^{5}*3^{2}*7

Formula for number of positive divisors for a number N= a p b q c r a^{p}*b^{q}*c^{r} is (p+1)(q+1)(r+1).

So the answer is (5+1)(2+1)(1+1)= 36 \boxed{36}

2016 = 2 5 3 2 7 1 2016 = 2^5 * 3^2 * 7^1

Therefore, we can get a divisor of 2016 taking 2 x 3 y 7 z 2^x * 3 ^y * 7^z where x x is any value from 0 0 to 5 5 , y y is any value from 0 0 to 2 2 and z z is any value from 0 0 to 1 1 (integer values).

So, our answer is ( 5 + 1 ) ( 2 + 1 ) ( 1 + 1 ) (5+1)(2+1)(1+1) Note that it is 5 + 1 5 + 1 and not 5 5 because we are including 0 0 .

= 36 =\boxed{36}

Fengyu Seah
Nov 3, 2013

Using prime factorization, 2016 = 2 5 × 3 2 × 7 2016=2^5\times3^2\times7 .

Therefore, 2016 2016 has ( 5 + 1 ) ( 2 + 1 ) ( 1 + 1 ) = 36 (5+1)(2+1)(1+1) = 36 positive divisors.

Sam Dreilinger
Nov 3, 2013

2016 = 2^{5} \times 3^{2} \times 7^{1} You form a divisor by picking a subset of the prime factors to multiply together. There are 6 choices for how many 2's to include (0, 1, 2, 3, 4, or 5), 3 choices for how many 3's to include (0, 1, or 2), and 2 choices for how many 7's to include (0 or 1). Thus the number of divisors is 6 \times 3 \times 2 = \boxed{36}

Ishan Arya
Nov 4, 2013

there is a formula for this ..... n=p^a * q^b * r^c....... ( ^ is the symbol for power...ex. 2 2 2 2 = 2^4) d(n)=(a+1) * (b+1) * (c+1)........ let a no. be 2016=2 2 2 2 2 3 3 7 = 2^5 * 3^2 * 7^1 (according to equation n=p^a q^b r^c......a=5,b=2,c=1) d(2016)=(5+1)(2+1)(1+1) =6 3 2 =36

Shubham Kumar
Nov 3, 2013

2016 can be factorized as (2^5) * (3^2) * (7)

Formula for finding total no. of divisors of (2^m) * (3^n) * (5^p) * (7^q) = (m + 1)(n + 1)(p + 1)(q + 1)

Therefore,

Total no. of divisors = 6 * 3 * 2 = 36 (Ans.)

2016 can be converted into product of three prime numbers namely 2, 3 and 7 with powers 5 , 2 and 1 respectively. So , Total no.s of factors=(5+1) (2+1) (1+1) =36.

Jack Rawlin
Jan 2, 2015

The number of divisors a number has depends on what it's prime factors are so first we find the prime factors.

2016 2016 is equal to 2 5 3 2 7 1 2^5 \cdot 3^2 \cdot 7^1 in it's prime factorised form.

This doesn't give us all the divisors though but since we have it in it's factorised form the divisors become the product of varying amounts of the factors, for example if we ignore the 3 2 3^2 and the 7 1 7^1 you'll find that 32 32 is a factor of 2016 2016 Since the powers can also be altered the amount of options available for each number become one more than the power (since it can also include zero) so the number of divisors of 2016 2016 is

( 5 + 1 ) ( 2 + 1 ) ( 1 + 1 ) = 36 (5+1)(2+1)(1+1) = 36

The general formula for this is

n 1 p 1 n 2 p 2 n 3 p 3 = n n_{1}^{p_1} \cdot n_{2}^{p_2} \cdot n_{3}^{p_3}\cdot\ldots = n

( p 1 + 1 ) ( p 2 + 1 ) ( p 3 + 1 ) = d (p_1 + 1)\cdot(p_2 + 1)\cdot(p_3 + 1)\cdot\ldots = d

Where n = n = Original number , n x = n_x = Prime factor of n n , p x = p_x = Power applied to n x n_x and d = d = Number of divisors

Didarul Alam
Dec 27, 2014

did it with this code

for(i=1;i<=n;i++) { if(n%i==0) { count++; } cout<<count;

Anna Anant
Dec 27, 2014

2016=2^5 3^2 7 so 6 3 2=36

Christian Cortez
Nov 9, 2013

Brother Google.

First, find the prime factorization of 2016, which is 2 to the 5th power, 3 to the 2nd power, and 7. Then add 1 to each of the powers, and multiply them. 6 times 3 times 2 is 36.

Sriram Raghavan
Nov 7, 2013

a. First find the prime factorization: 2016 = 2^5 * 3^2 * 7^1 b. Adding 1 to each exponent we get: 5+1, 2+1 and 1+1 or 6,3,2 c. Multiplying these numbers together we get 36 d. The answer is 36.

Yan Yau Cheng
Nov 7, 2013

The Prime Factorization of 2016 is: $$2^5\times 3^2 \times 7$$ The number of divisors of 2016: $$6\times 3 \times 2 = 36$$

2016=2^{5}.3^{2}.7 therefore number of divisors=(5+1)(2+1)(1+1)=6.3.2=36

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