316 (number)

{{Infobox number|number=316}}316 (three hundred [and] sixteen) is the natural number following 315 and preceding 317. The factors of 316 are 1, 2, 4, 79, 158 and 316.{{Cite web |title=Factors of 316 - Find Prime Factorization/Factors of 316 |url=https://www.cuemath.com/numbers/factors-of-316/ |access-date=2025-07-01 |website=Cuemath |language=en}} This can be represented in the form 2² × 79. 316 is a centered triangular number and a centered heptagonal number.{{Cite OEIS |A005448 }}{{Cite OEIS |A069099 }}

316 is also an Ulam number{{Cite OEIS|A002858}} and a member of one Tetranacci sequence.{{Cite OEIS|A001630}} It appears in counting asymmetric polyominoes{{cite OEIS|A006749}} and binary-matrix involutions.{{Cite OEIS |A053722}}