A344586 - cp's OEIS frontend

A344586 Numbers k for which A003415(k) >= A001065(k), where A003415 gives the arithmetic derivative, and A001065 is the sum of proper divisors.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	20
17	23
18	24
19	25
20	27
21	28
22	29
23	31
24	32
25	36
26	37
27	40
28	41
29	43
30	44
31	45
32	47
33	48
34	49
35	50
36	52
37	53
38	54
39	56
40	59
41	61
42	63
43	64
44	67
45	68
46	71
47	72
48	73
49	75
50	76
51	79
52	80
53	81
54	83
55	88
56	89
57	92
58	96
59	97
60	98
61	99
62	100
63	101
64	103
65	104
66	107
67	108
68	109
69	112
70	113
71	116
72	117
73	120
74	121
75	124
76	125
77	127
78	128
79	131

[1, 2, 3, 4, 5, 7, 8, 9, 11, 12, 13, 16, 17, 18, 19, 20, 23, 24, 25, 27, 28, 29, 31, 32, 36, 37, 40, 41, 43, 44, 45, 47, 48, 49, 50, 52, 53, 54, 56, 59, 61, 63, 64, 67, 68, 71, 72, 73, 75, 76, 79, 80, 81, 83, 88, 89, 92, 96, 97, 98, 99, 100, 101, 103, 104, 107, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125, 127, 128, 131]

cp's OEIS Frontend

A344586 Numbers k for which A003415(k) >= A001065(k), where A003415 gives the arithmetic derivative, and A001065 is the sum of proper divisors.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	20
17	23
18	24
19	25
20	27
21	28
22	29
23	31
24	32
25	36
26	37
27	40
28	41
29	43
30	44
31	45
32	47
33	48
34	49
35	50
36	52
37	53
38	54
39	56
40	59
41	61
42	63
43	64
44	67
45	68
46	71
47	72
48	73
49	75
50	76
51	79
52	80
53	81
54	83
55	88
56	89
57	92
58	96
59	97
60	98
61	99
62	100
63	101
64	103
65	104
66	107
67	108
68	109
69	112
70	113
71	116
72	117
73	120
74	121
75	124
76	125
77	127
78	128
79	131

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	20
17	23
18	24
19	25
20	27
21	28
22	29
23	31
24	32
25	36
26	37
27	40
28	41
29	43
30	44
31	45
32	47
33	48
34	49
35	50
36	52
37	53
38	54
39	56
40	59
41	61
42	63
43	64
44	67
45	68
46	71
47	72
48	73
49	75
50	76
51	79
52	80
53	81
54	83
55	88
56	89
57	92
58	96
59	97
60	98
61	99
62	100
63	101
64	103
65	104
66	107
67	108
68	109
69	112
70	113
71	116
72	117
73	120
74	121
75	124
76	125
77	127
78	128
79	131

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	12
11	13
12	16
13	17
14	18
15	19
16	20
17	23
18	24
19	25
20	27
21	28
22	29
23	31
24	32
25	36
26	37
27	40
28	41
29	43
30	44
31	45
32	47
33	48
34	49
35	50
36	52
37	53
38	54
39	56
40	59
41	61
42	63
43	64
44	67
45	68
46	71
47	72
48	73
49	75
50	76
51	79
52	80
53	81
54	83
55	88
56	89
57	92
58	96
59	97
60	98
61	99
62	100
63	101
64	103
65	104
66	107
67	108
68	109
69	112
70	113
71	116
72	117
73	120
74	121
75	124
76	125
77	127
78	128
79	131