diff options
| author | drbaggy <js5@sanger.ac.uk> | 2021-04-26 09:15:20 +0100 |
|---|---|---|
| committer | drbaggy <js5@sanger.ac.uk> | 2021-04-26 09:15:20 +0100 |
| commit | 03f28cae3ddea3b08a671dd3f20f3d32777aa4db (patch) | |
| tree | 7aea1f86e706cf8233d89d704ac2342a0c63d059 /challenge-109/colin-crain/python/ch-1.py | |
| parent | 46b8aecc9397c6211a1e97a7f0638833726294a2 (diff) | |
| parent | 1ff197d81f941c3dd35d77bec8a0326807e8d2b1 (diff) | |
| download | perlweeklychallenge-club-03f28cae3ddea3b08a671dd3f20f3d32777aa4db.tar.gz perlweeklychallenge-club-03f28cae3ddea3b08a671dd3f20f3d32777aa4db.tar.bz2 perlweeklychallenge-club-03f28cae3ddea3b08a671dd3f20f3d32777aa4db.zip | |
Merge remote-tracking branch 'upstream/master'
Diffstat (limited to 'challenge-109/colin-crain/python/ch-1.py')
| -rw-r--r-- | challenge-109/colin-crain/python/ch-1.py | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/challenge-109/colin-crain/python/ch-1.py b/challenge-109/colin-crain/python/ch-1.py new file mode 100644 index 0000000000..554f5b5518 --- /dev/null +++ b/challenge-109/colin-crain/python/ch-1.py @@ -0,0 +1,36 @@ +#!/usr/bin/env python3
+#
+#
+# chowla.py
+#
+# TASK #1 › Chowla Numbers
+# Submitted by: Mohammad S Anwar
+# Write a script to generate first 20 Chowla Numbers, named after, Sarvadaman D. S. Chowla, a London born Indian American mathematician. It is defined as:
+#
+# C(n) = sum of divisors of n except 1 and n
+#
+# Output:
+# 0, 0, 0, 2, 0, 5, 0, 6, 3, 7, 0, 15, 0, 9, 8, 14, 0, 20, 0, 21
+#
+#
+#
+# © 2021 colin crain
+## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ##
+
+import math
+
+def sum_divisors (n):
+ out = 0
+ for d in range( 2, int(math.sqrt(n))+1 ):
+ id = divmod(n,d)
+ if id[1] == 0:
+ out += d
+ if id[0] != d:
+ out += id[0]
+ return out
+
+
+for n in range(1,21):
+ print(f"C({n}) = ", sum_divisors(n))
+
+
|