The binomial coefficient 10C3 = 120. 120 = 23 3 5 = 2 2 2 3 5, and 2 + 2 + 2 + 3 + 5 = 14. So the sum of the terms in the prime factorisation of 10C3 is 14. Find the sum of the terms in the prime factorisation of 20000000C15000000.