A273777 - cp's OEIS frontend

A273777 Consider all ways of writing the n-th composite number as the product of two divisors d1d2 = d3d4 = ... where each divisor is larger than 1; a(n) is the maximum of the sums {d1 + d2, d3 + d4, ...}.

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

[4, 5, 6, 6, 7, 8, 9, 8, 10, 11, 12, 10, 13, 14, 10, 15, 12, 16, 17, 18, 14, 19, 12, 20, 21, 16, 22, 23, 24, 18, 25, 26, 14, 27, 20, 28, 29, 16, 30, 22, 31, 32, 33, 24, 34, 18, 35, 36, 26, 37, 38, 39, 28, 40, 18, 41, 42, 30, 43, 44, 22, 45, 32, 46, 47, 20, 48]

cp's OEIS Frontend

A273777 Consider all ways of writing the n-th composite number as the product of two divisors d1d2 = d3d4 = ... where each divisor is larger than 1; a(n) is the maximum of the sums {d1 + d2, d3 + d4, ...}.

Table of values

List of values

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

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

cp's OEIS Frontend

A273777 Consider all ways of writing the n-th composite number as the product of two divisors d1*d2 = d3*d4 = ... where each divisor is larger than 1; a(n) is the maximum of the sums {d1 + d2, d3 + d4, ...}.

Table of values

List of values

A273777 Consider all ways of writing the n-th composite number as the product of two divisors d1d2 = d3d4 = ... where each divisor is larger than 1; a(n) is the maximum of the sums {d1 + d2, d3 + d4, ...}.

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