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use crate::sum_of_multiples_count_times_i_range::*; pub fn sum_of_divisors_sum(n: u64) -> u64 { sum_of_multiples_count_times_i_range(n, 1, n) } #[cfg(test)] mod tests { #[test] fn test() { use super::*; assert_eq!(sum_of_divisors_sum(4), 15); } }