From Longman Dictionary of Contemporary Englishby a factor of five/ten etcby a factor of five/ten etcHMNCOUNT/CALCULATEif something increases or decreases by a factor of five, ten etc, it increases or decreases by five times, ten times etc → factor

Examples from the Corpus

by a factor of five/ten etc• Other watches of the time sped up or slowed down by a factor of ten seconds for every one-degree change in temperature.• So look at your friends, see what they are a little vain about and then multiply by a factor of ten.