# [Factor] + `math.functions`, 20 bytes [ sqrt dup floor = ] [Try it online!][TIO-kmjvo802] [Factor]: https://factorcode.org/ [TIO-kmjvo802]: https://tio.run/##HcwxDgIhEAXQ3lP8E2xkJYAaa2NjY6yMxQaHuHEFdhgKYzw7GvuXFwYvidv5dDjuN3gOckdmEnllHqPgQRxpQqG5UvRU/qILNXoZUyzYLt5YQqGHxhrKQFkYDefQK221Wxlt8UG7oMwsuNWMMKXE2OHafllG174 "Factor – Try It Online"