A348506 - cp's OEIS frontend

A348506 Numbers k such that sigma(k) is a multiple of usigma(k), where sigma is the sum of divisors function, A000203, and usigma is the unitary sigma, A034448.

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	10
8	11
9	13
10	14
11	15
12	17
13	19
14	21
15	22
16	23
17	26
18	29
19	30
20	31
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	46
31	47
32	51
33	53
34	55
35	57
36	58
37	59
38	61
39	62
40	65
41	66
42	67
43	69
44	70
45	71
46	73
47	74
48	77
49	78
50	79
51	82
52	83
53	85
54	86
55	87
56	89
57	91
58	93
59	94
60	95
61	97
62	101
63	102
64	103
65	105
66	106
67	107
68	108
69	109
70	110
71	111
72	113
73	114
74	115
75	118
76	119

[1, 2, 3, 5, 6, 7, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 26, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41, 42, 43, 46, 47, 51, 53, 55, 57, 58, 59, 61, 62, 65, 66, 67, 69, 70, 71, 73, 74, 77, 78, 79, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 101, 102, 103, 105, 106, 107, 108, 109, 110, 111, 113, 114, 115, 118, 119]

cp's OEIS Frontend

A348506 Numbers k such that sigma(k) is a multiple of usigma(k), where sigma is the sum of divisors function, A000203, and usigma is the unitary sigma, A034448.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	10
8	11
9	13
10	14
11	15
12	17
13	19
14	21
15	22
16	23
17	26
18	29
19	30
20	31
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	46
31	47
32	51
33	53
34	55
35	57
36	58
37	59
38	61
39	62
40	65
41	66
42	67
43	69
44	70
45	71
46	73
47	74
48	77
49	78
50	79
51	82
52	83
53	85
54	86
55	87
56	89
57	91
58	93
59	94
60	95
61	97
62	101
63	102
64	103
65	105
66	106
67	107
68	108
69	109
70	110
71	111
72	113
73	114
74	115
75	118
76	119

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	10
8	11
9	13
10	14
11	15
12	17
13	19
14	21
15	22
16	23
17	26
18	29
19	30
20	31
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	46
31	47
32	51
33	53
34	55
35	57
36	58
37	59
38	61
39	62
40	65
41	66
42	67
43	69
44	70
45	71
46	73
47	74
48	77
49	78
50	79
51	82
52	83
53	85
54	86
55	87
56	89
57	91
58	93
59	94
60	95
61	97
62	101
63	102
64	103
65	105
66	106
67	107
68	108
69	109
70	110
71	111
72	113
73	114
74	115
75	118
76	119

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	7
7	10
8	11
9	13
10	14
11	15
12	17
13	19
14	21
15	22
16	23
17	26
18	29
19	30
20	31
21	33
22	34
23	35
24	37
25	38
26	39
27	41
28	42
29	43
30	46
31	47
32	51
33	53
34	55
35	57
36	58
37	59
38	61
39	62
40	65
41	66
42	67
43	69
44	70
45	71
46	73
47	74
48	77
49	78
50	79
51	82
52	83
53	85
54	86
55	87
56	89
57	91
58	93
59	94
60	95
61	97
62	101
63	102
64	103
65	105
66	106
67	107
68	108
69	109
70	110
71	111
72	113
73	114
74	115
75	118
76	119