Calculate the number of divisors of the number 7200.

2024

Calculate the number of divisors of the number 7200.

  1. A.

    25

  2. B.

    54

  3. C.

    63

  4. D.

    12

Attempted by 51 students.

Show answer & explanation

Correct answer: B

Step-by-Step Solution

  1. Find Prime Factorization: First, express the number 7200 as a product of its prime factors.

    • 7200 = 72 * 100

    • 7200 = (8 * 9) * (4 * 25)

    • 7200 = (2^3 * 3^2) * (2^2 * 5^2)

    • 7200 = 2^(3+2) * 3^2 * 5^2

    • 7200 = 2^5 * 3^2 * 5^2

  2. Apply the Formula for Number of Divisors: If a number n is written in the form (p^a) * (q^b) * (r^c)..., where p, q, and r are prime factors, the total number of divisors is found by taking the product of each exponent incremented by 1: (a + 1)(b + 1)(c + 1)...

  3. Calculate:

    • Exponents are 5, 2, and 2.

    • Number of divisors = (5 + 1) * (2 + 1) * (2 + 1)

    • Number of divisors = 6 * 3 * 3

    • Number of divisors = 54.

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