The phrase "attributable to a number" is correct and usable in written English.
It can be used when discussing causes or reasons that can be linked to a specific quantity or figure.
Example: "The increase in sales is attributable to a number of marketing strategies implemented last quarter."
Alternatives: "due to several factors" or "linked to a variety of reasons".
This was attributable to a number of reasons.
The spike is thought to be attributable to a number of reasons, with one being that heroin is now a cheaper addiction to maintain than prescription pharmaceuticals which have recently become subject to tighter regulations.
This is most likely attributable to a number of factors.
The rights organization noted the milestone was attributable to a number of efforts, including recent moves from major tech companies to implement HTTPS on their own properties.
It has been observed that alcohol flames generally produce lower concentrations of NO emissions and the cause of these reductions is attributable to a number of mechanisms.
However, it may be attributable to a number of factors including the ionic strength of the mixed liquor and the presence of organic chlorides and minerals.
The high incidence of affected dogs in the Kinki district seems to be attributable to a small number of popular carrier sires (shown by an asterisk in Figure 3) in the same region.
now believe that many, if not most, of SARS cases may be attributable to a small number of people who passed on the disease with great efficiency -- so-called superspreaders.
Much of the film follows a middle-of-the-road version of jazz history, but most of its quirks are directly attributable to a small number of critics and musicians, including Wynton Marsalis, Stanley Crouch, Albert Murray and Gary Giddins, who are used extensively as commentators in the film.
Reductions in total egg production in atrazine treatment groups were most attributable to a reduced number of eggs ovulated by females in atrazine-treated tanks.
Empirical observations that inform international design guidelines are largely attributable to a small number of investigative studies with a limited range of roof drainage system configurations and flow conditions.
