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Perfect Number 용의자X

About

In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number itself. For instance, 6 has proper divisors 1, 2, and 3, and 1 + 2 + 3 = 6, so 6 is a perfect number. The next perfect number is 28, because 28 has proper divisors 1, 2, 4, 7, 14, and 1 + 2 + 4 + 7 + 14 = 28. The first seven perfect numbers are 6, 28, 496, 8128, 33550336, 8589869056, and 137438691328 (sequence A000396 in the OEIS).

Description via Wikipedia (lead extract) · name cross-verified Wikidata + Wikipedia.

Verified facts

Perfect Number (용의자X) — verified Korean film. Released 2012-10-07. Directed by Bang Eun-jin. 3 verified cast.

Details

• Runtime (min): 119
• Genre: mystery film
• Original language: Korean
• First Example: 6
• Second Example: 28
• Label: Perfect number

Source reconciliation

• Wikipedia lists the Korean name as 완전수; KoreaAPI uses 용의자X (chosen by source authority).

Independent sources disagreed here — shown, not hidden.

Cast (3)

• Ryoo Seung-bum
• Lee Yo-won
• Cho Jin-woong

Director

• Bang Eun-jin

Q&A — what agents ask

Cross-checked by 3 source(s)

• Wikidata — structured open knowledge base · view ↗
• Wikipedia — encyclopedic article · view ↗
• TMDB — film/TV community database

Verification history

Verified & tracked since 2026-08-19 · 5 verified snapshots.

Append-only, timestamped — the record of WHEN a fact changed, which a latecomer cannot backfill. Full feed: /changes.json · machine-readable: get_history("film:perfectnumber").

Verified badge

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