Data commit

Task/Arithmetic-numbers/Python/arithmetic-numbers.py

@@ -0,0 +1,30 @@
+def factors(n: int):
+    f = set([1, n])
+    i = 2
+    while True:
+        j = n // i
+        if j < i:
+            break
+        if i * j == n:
+            f.add(i)
+            f.add(j)
+        i += 1
+    return f
+
+arithmetic_count = 0
+composite_count = 0
+n = 1
+while arithmetic_count <= 1000000:
+    f = factors(n)
+    if (sum(f)/len(f)).is_integer():
+        arithmetic_count += 1
+        if len(f) > 2:
+            composite_count += 1
+        if arithmetic_count <= 100:
+            print(f'{n:3d} ', end='')
+            if arithmetic_count % 10 == 0:
+                print()
+        if arithmetic_count in (1000, 10000, 100000, 1000000):
+            print(f'\n{arithmetic_count}th arithmetic number is {n}')
+            print(f'Number of composite arithmetic numbers <= {n}: {composite_count}')
+    n += 1