Python Program to find Prime Factors of a Number

Write a Python Program to find Prime Factors of a Number using For Loop, and While Loop with example.

TIP: I suggest you to refer Factors of a Number, and Prime Number articles to understand the logic.

Python Program to find Prime Factors of a Number using For Loop

This python program allows the user to enter any positive integer. Next, it will return the prime factors of that number using the For Loop.

# Python Program to find Prime Factors of a Number
 
Number = int(input(" Please Enter any Number: "))

for i in range(2, Number + 1):
    if(Number % i == 0):
        isprime = 1
        for j in range(2, (i //2 + 1)):
            if(i % j == 0):
                isprime = 0
                break
            
        if (isprime == 1):
            print(" %d is a Prime Factor of a Given Number %d" %(i, Number))

OUTPUT

Python Program to Display Prime Factors of a Number using While Loop

This program is same as above. Here, we replaced For Loop with While Loop

# Python Program to find Prime Factors of a Number
 
Number = int(input(" Please Enter any Number: "))
i = 1

while(i <= Number):
    count = 0
    if(Number % i == 0):
        j = 1
        while(j <= i):
            if(i % j == 0):
                count = count + 1
            j = j + 1
            
        if (count == 2):
            print(" %d is a Prime Factor of a Given Number %d" %(i, Number))
    i = i + 1

OUTPUT