LCM and HCF · Factors and Multiples : All the numbers that divide a number completely, i. To understand HCF (Highest Common Factor) and LCM (Lowest Common Multiple) better. To access all videos related to HCF and LCM, enrol in our full course now: https:// bit. Finding HCF & LCM with prime factorisations. The product of highest common factor (H.