A327670 - cp's OEIS frontend

A327670 Sum of divisors of n that have an even number of distinct prime factors.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	7
7	1
8	1
9	1
10	11
11	1
12	19
13	1
14	15
15	16
16	1
17	1
18	25
19	1
20	31
21	22
22	23
23	1
24	43
25	1
26	27
27	1
28	43
29	1
30	32
31	1
32	1
33	34
34	35
35	36
36	73
37	1
38	39
39	40
40	71
41	1
42	42
43	1
44	67
45	61
46	47
47	1
48	91
49	1
50	61
51	52
52	79
53	1
54	79
55	56
56	99
57	58
58	59
59	1
60	64
61	1
62	63
63	85
64	1
65	66
66	62
67	1
68	103
69	70
70	60
71	1
72	169
73	1
74	75
75	91

[1, 1, 1, 1, 1, 7, 1, 1, 1, 11, 1, 19, 1, 15, 16, 1, 1, 25, 1, 31, 22, 23, 1, 43, 1, 27, 1, 43, 1, 32, 1, 1, 34, 35, 36, 73, 1, 39, 40, 71, 1, 42, 1, 67, 61, 47, 1, 91, 1, 61, 52, 79, 1, 79, 56, 99, 58, 59, 1, 64, 1, 63, 85, 1, 66, 62, 1, 103, 70, 60, 1, 169, 1, 75, 91]

cp's OEIS Frontend

A327670 Sum of divisors of n that have an even number of distinct prime factors.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	7
7	1
8	1
9	1
10	11
11	1
12	19
13	1
14	15
15	16
16	1
17	1
18	25
19	1
20	31
21	22
22	23
23	1
24	43
25	1
26	27
27	1
28	43
29	1
30	32
31	1
32	1
33	34
34	35
35	36
36	73
37	1
38	39
39	40
40	71
41	1
42	42
43	1
44	67
45	61
46	47
47	1
48	91
49	1
50	61
51	52
52	79
53	1
54	79
55	56
56	99
57	58
58	59
59	1
60	64
61	1
62	63
63	85
64	1
65	66
66	62
67	1
68	103
69	70
70	60
71	1
72	169
73	1
74	75
75	91

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	7
7	1
8	1
9	1
10	11
11	1
12	19
13	1
14	15
15	16
16	1
17	1
18	25
19	1
20	31
21	22
22	23
23	1
24	43
25	1
26	27
27	1
28	43
29	1
30	32
31	1
32	1
33	34
34	35
35	36
36	73
37	1
38	39
39	40
40	71
41	1
42	42
43	1
44	67
45	61
46	47
47	1
48	91
49	1
50	61
51	52
52	79
53	1
54	79
55	56
56	99
57	58
58	59
59	1
60	64
61	1
62	63
63	85
64	1
65	66
66	62
67	1
68	103
69	70
70	60
71	1
72	169
73	1
74	75
75	91

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	7
7	1
8	1
9	1
10	11
11	1
12	19
13	1
14	15
15	16
16	1
17	1
18	25
19	1
20	31
21	22
22	23
23	1
24	43
25	1
26	27
27	1
28	43
29	1
30	32
31	1
32	1
33	34
34	35
35	36
36	73
37	1
38	39
39	40
40	71
41	1
42	42
43	1
44	67
45	61
46	47
47	1
48	91
49	1
50	61
51	52
52	79
53	1
54	79
55	56
56	99
57	58
58	59
59	1
60	64
61	1
62	63
63	85
64	1
65	66
66	62
67	1
68	103
69	70
70	60
71	1
72	169
73	1
74	75
75	91