Find the prime factors of a number
>>> for n in range(2, 10):
... for x in range(2, n):
... if n % x == 0:
... print(n, 'equals', x, '*', n//x)
... break
... else:
... # loop fell through without finding a factor
... print(n, 'is a prime number')
...
2 is a prime number
3 is a prime number
4 equals 2 * 2
5 is a prime number
6 equals 2 * 3
7 is a prime number
8 equals 2 * 4
9 equals 3 * 3Prime factors of a number
public List<Integer> factorsOf(int n) {
ArrayList<Integer> factors = new ArrayList<>();
for (int d = 2; n > 1; d++)
for (; n % d == 0; n /= d)
factors.add(d);
return factors;
}Copyright © 2021 Codeinu
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