To calculate the sum of all natural values of n that satisfy the LCM condition (n; 45) = 45, first we find all possible values of n. Since the LCM (n; 45) is equal to the number 45 itself, 45 is a multiple of n. To find all divisors of 45, we factor this number into prime factors:
45 = 3 3 5.
So n can be prime 3 or 5.
now we will find all composite factors of 45, multiplying its prime factors in all ways:
3 * 3 = 9;
3 * 5 = 15.
Hence, n = 1; 3; 5; nine; 15; 45.
We calculate their sum: 1 + 3 + 5 + 9 + 15 + 45 = 969.
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