[scripts] add factors function for pycalc

scripts/pycalc_startup.py

@@ -1,3 +1,14 @@
 from math import *
 
+
+def factors(n):
+    result = set()
+    for i in range(1, int(sqrt(n)) + 1):
+        div, mod = divmod(n, i)
+        if mod == 0:
+            result.add(div)
+            result.add(mod)
+    return result
+
+
 print("loaded Python calculator")