Calculate the number of divisors of the number 7200.
2024
Calculate the number of divisors of the number 7200.
- A.
25
- B.
54
- C.
63
- D.
12
Attempted by 51 students.
Show answer & explanation
Correct answer: B
Step-by-Step Solution
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
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)...
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.