A085718 - cp's OEIS frontend

A085718 Numbers n such that sopfr(n)/spf(n) is a semiprime and sopfr(n)/lpf(n) is a semiprime, where sopfr(n) = A001414(n) is sum of primes dividing n (with repetition), spf(n) and lpf(n) are smallest and largest primes dividing n, respectively. Also, spf(n)!=lpf(n).

n	a(n)
1	72
2	576
3	648
4	750
5	800
6	900
7	960
8	1080
9	3430
10	4116
11	4900
12	5880
13	6272
14	7000
15	7056
16	7938
17	8400
18	8960
19	9450
20	10080
21	10752
22	11340
23	12096
24	13608
25	18750
26	20000
27	22500
28	24000
29	25600
30	27000
31	28800
32	30375
33	30720
34	32400
35	34560
36	36450
37	36864
38	37268

[72, 576, 648, 750, 800, 900, 960, 1080, 3430, 4116, 4900, 5880, 6272, 7000, 7056, 7938, 8400, 8960, 9450, 10080, 10752, 11340, 12096, 13608, 18750, 20000, 22500, 24000, 25600, 27000, 28800, 30375, 30720, 32400, 34560, 36450, 36864, 37268]

cp's OEIS Frontend

A085718 Numbers n such that sopfr(n)/spf(n) is a semiprime and sopfr(n)/lpf(n) is a semiprime, where sopfr(n) = A001414(n) is sum of primes dividing n (with repetition), spf(n) and lpf(n) are smallest and largest primes dividing n, respectively. Also, spf(n)!=lpf(n).

Table of values

List of values