Find the sum 4 + 5 + 6 + 8 + 10 + 12 + 15 + ... + 60,000 of all the positive integers not exceeding 60,000 which are integral multiples of at least one of 4, 5, and 6.
4 + 5 + 6 + 8 + 10 + 12 + 15 + ... + 60,000==840,030,000