A001065 - cp's OEIS frontend

A001065 Sum of proper divisors (or aliquot parts) of n: sum of divisors of n that are less than n.

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	7
9	4
10	8
11	1
12	16
13	1
14	10
15	9
16	15
17	1
18	21
19	1
20	22
21	11
22	14
23	1
24	36
25	6
26	16
27	13
28	28
29	1
30	42
31	1
32	31
33	15
34	20
35	13
36	55
37	1
38	22
39	17
40	50
41	1
42	54
43	1
44	40
45	33
46	26
47	1
48	76
49	8
50	43
51	21
52	46
53	1
54	66
55	17
56	64
57	23
58	32
59	1
60	108
61	1
62	34
63	41
64	63
65	19
66	78
67	1
68	58
69	27
70	74
71	1
72	123
73	1
74	40
75	49
76	64
77	19
78	90
79	1
80	106

[0, 1, 1, 3, 1, 6, 1, 7, 4, 8, 1, 16, 1, 10, 9, 15, 1, 21, 1, 22, 11, 14, 1, 36, 6, 16, 13, 28, 1, 42, 1, 31, 15, 20, 13, 55, 1, 22, 17, 50, 1, 54, 1, 40, 33, 26, 1, 76, 8, 43, 21, 46, 1, 66, 17, 64, 23, 32, 1, 108, 1, 34, 41, 63, 19, 78, 1, 58, 27, 74, 1, 123, 1, 40, 49, 64, 19, 90, 1, 106]

cp's OEIS Frontend

A001065 Sum of proper divisors (or aliquot parts) of n: sum of divisors of n that are less than n.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	7
9	4
10	8
11	1
12	16
13	1
14	10
15	9
16	15
17	1
18	21
19	1
20	22
21	11
22	14
23	1
24	36
25	6
26	16
27	13
28	28
29	1
30	42
31	1
32	31
33	15
34	20
35	13
36	55
37	1
38	22
39	17
40	50
41	1
42	54
43	1
44	40
45	33
46	26
47	1
48	76
49	8
50	43
51	21
52	46
53	1
54	66
55	17
56	64
57	23
58	32
59	1
60	108
61	1
62	34
63	41
64	63
65	19
66	78
67	1
68	58
69	27
70	74
71	1
72	123
73	1
74	40
75	49
76	64
77	19
78	90
79	1
80	106

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	7
9	4
10	8
11	1
12	16
13	1
14	10
15	9
16	15
17	1
18	21
19	1
20	22
21	11
22	14
23	1
24	36
25	6
26	16
27	13
28	28
29	1
30	42
31	1
32	31
33	15
34	20
35	13
36	55
37	1
38	22
39	17
40	50
41	1
42	54
43	1
44	40
45	33
46	26
47	1
48	76
49	8
50	43
51	21
52	46
53	1
54	66
55	17
56	64
57	23
58	32
59	1
60	108
61	1
62	34
63	41
64	63
65	19
66	78
67	1
68	58
69	27
70	74
71	1
72	123
73	1
74	40
75	49
76	64
77	19
78	90
79	1
80	106

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	6
7	1
8	7
9	4
10	8
11	1
12	16
13	1
14	10
15	9
16	15
17	1
18	21
19	1
20	22
21	11
22	14
23	1
24	36
25	6
26	16
27	13
28	28
29	1
30	42
31	1
32	31
33	15
34	20
35	13
36	55
37	1
38	22
39	17
40	50
41	1
42	54
43	1
44	40
45	33
46	26
47	1
48	76
49	8
50	43
51	21
52	46
53	1
54	66
55	17
56	64
57	23
58	32
59	1
60	108
61	1
62	34
63	41
64	63
65	19
66	78
67	1
68	58
69	27
70	74
71	1
72	123
73	1
74	40
75	49
76	64
77	19
78	90
79	1
80	106