Question

Write a Python program to decompose a number input by user.

First, your program should ask the user to input an integer. Then, your program will ouput the result of decomposition. For example, if the input is 97, since it is a prime number, there is no decomposition, just print 97=97. If the input number is 20, your program should output 20= 2*2*5

Answer 1

A Python program is provided to decompose an integer into its prime factors using a function named 'prime_decomposition'. The result is printed in the required format.

Step-by-step explanation:

The question is asking for a Python program that decomposes an integer input by the user into its prime factors. Here's how you can write such a program:

# Ask the user for an integer
number = int(input("Enter an integer: "))

# Function to perform the prime factor decomposition
def prime_decomposition(n):
i = 2
factors = []
while i * i <= n:
if n % i:
i += 1
else:
n //= i
factors.append(i)
if n > 1:
factors.append(n)
return factors

# Perform the decomposition
factors = prime_decomposition(number)

# Format and print the result
if len(factors) == 1:
print(f"{number}={factors[0]}")
else:
print(f"{number}=" + "*".join(map(str, factors)))

This program includes a function called prime_decomposition that finds the prime factors of the given number. The result is printed in the format requested (e.g., 20=2*2*5).