A360331 - cp's OEIS frontend

A360331 a(n) is the sum of divisors of n that have only prime factors that are not prime-indexed primes.

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	8
8	15
9	1
10	3
11	1
12	7
13	14
14	24
15	1
16	31
17	1
18	3
19	20
20	7
21	8
22	3
23	24
24	15
25	1
26	42
27	1
28	56
29	30
30	3
31	1
32	63
33	1
34	3
35	8
36	7
37	38
38	60
39	14
40	15
41	1
42	24
43	44
44	7
45	1
46	72
47	48
48	31
49	57
50	3
51	1
52	98
53	54
54	3
55	1
56	120
57	20
58	90
59	1
60	7
61	62
62	3
63	8
64	127
65	14
66	3
67	1
68	7
69	24
70	24
71	72
72	15
73	74
74	114
75	1

[1, 3, 1, 7, 1, 3, 8, 15, 1, 3, 1, 7, 14, 24, 1, 31, 1, 3, 20, 7, 8, 3, 24, 15, 1, 42, 1, 56, 30, 3, 1, 63, 1, 3, 8, 7, 38, 60, 14, 15, 1, 24, 44, 7, 1, 72, 48, 31, 57, 3, 1, 98, 54, 3, 1, 120, 20, 90, 1, 7, 62, 3, 8, 127, 14, 3, 1, 7, 24, 24, 72, 15, 74, 114, 1]

cp's OEIS Frontend

A360331 a(n) is the sum of divisors of n that have only prime factors that are not prime-indexed primes.

Table of values

List of values

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	8
8	15
9	1
10	3
11	1
12	7
13	14
14	24
15	1
16	31
17	1
18	3
19	20
20	7
21	8
22	3
23	24
24	15
25	1
26	42
27	1
28	56
29	30
30	3
31	1
32	63
33	1
34	3
35	8
36	7
37	38
38	60
39	14
40	15
41	1
42	24
43	44
44	7
45	1
46	72
47	48
48	31
49	57
50	3
51	1
52	98
53	54
54	3
55	1
56	120
57	20
58	90
59	1
60	7
61	62
62	3
63	8
64	127
65	14
66	3
67	1
68	7
69	24
70	24
71	72
72	15
73	74
74	114
75	1

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	8
8	15
9	1
10	3
11	1
12	7
13	14
14	24
15	1
16	31
17	1
18	3
19	20
20	7
21	8
22	3
23	24
24	15
25	1
26	42
27	1
28	56
29	30
30	3
31	1
32	63
33	1
34	3
35	8
36	7
37	38
38	60
39	14
40	15
41	1
42	24
43	44
44	7
45	1
46	72
47	48
48	31
49	57
50	3
51	1
52	98
53	54
54	3
55	1
56	120
57	20
58	90
59	1
60	7
61	62
62	3
63	8
64	127
65	14
66	3
67	1
68	7
69	24
70	24
71	72
72	15
73	74
74	114
75	1

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	8
8	15
9	1
10	3
11	1
12	7
13	14
14	24
15	1
16	31
17	1
18	3
19	20
20	7
21	8
22	3
23	24
24	15
25	1
26	42
27	1
28	56
29	30
30	3
31	1
32	63
33	1
34	3
35	8
36	7
37	38
38	60
39	14
40	15
41	1
42	24
43	44
44	7
45	1
46	72
47	48
48	31
49	57
50	3
51	1
52	98
53	54
54	3
55	1
56	120
57	20
58	90
59	1
60	7
61	62
62	3
63	8
64	127
65	14
66	3
67	1
68	7
69	24
70	24
71	72
72	15
73	74
74	114
75	1