Data update

Task/Duffinian-numbers/Python/duffinian-numbers.py

@@ -0,0 +1,30 @@
+# duffinian.py by xing216
+
+def factors(n):
+    factors = []
+    for i in range(1, n + 1):
+       if n % i == 0:
+           factors.append(i)
+    return factors
+def gcd(a, b):
+    while b != 0:
+        a, b = b, a % b
+    return a
+is_relively_prime = lambda a, b: gcd(a, b) == 1
+sigma_sum = lambda x: sum(factors(x))
+is_duffinian = lambda x: is_relively_prime(x, sigma_sum(x)) and len(factors(x)) > 2
+count = 0
+i = 0
+while count < 50:
+    if is_duffinian(i):
+        print(i, end=' ')
+        count += 1
+    i+=1
+count2 = 0
+j = 0
+while count2 < 20:
+    if is_duffinian(j) and is_duffinian(j+1) and is_duffinian(j+2):
+        print(f"({j},{j+1},{j+2})", end=' ')
+        count2 += 1
+        j+=3
+    j+=1