Revision 11d9d2fb-e1ce-4eaf-a2b0-6df93e1ebfbc - Code Golf Stack Exchange

# [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"