A097975 - cp's OEIS frontend

A097975 a(n) is the prime divisor of n which is >= sqrt(n), or 0 if there is no such prime divisor.

n	a(n)
1	0
2	2
3	3
4	2
5	5
6	3
7	7
8	0
9	3
10	5
11	11
12	0
13	13
14	7
15	5
16	0
17	17
18	0
19	19
20	5
21	7
22	11
23	23
24	0
25	5
26	13
27	0
28	7
29	29
30	0
31	31
32	0
33	11
34	17
35	7
36	0
37	37
38	19
39	13
40	0
41	41
42	7
43	43
44	11
45	0
46	23
47	47
48	0
49	7
50	0
51	17
52	13
53	53
54	0
55	11
56	0
57	19
58	29
59	59
60	0
61	61
62	31
63	0
64	0
65	13
66	11
67	67
68	17
69	23
70	0
71	71
72	0
73	73
74	37
75	0
76	19
77	11
78	13
79	79
80	0
81	0
82	41
83	83

[0, 2, 3, 2, 5, 3, 7, 0, 3, 5, 11, 0, 13, 7, 5, 0, 17, 0, 19, 5, 7, 11, 23, 0, 5, 13, 0, 7, 29, 0, 31, 0, 11, 17, 7, 0, 37, 19, 13, 0, 41, 7, 43, 11, 0, 23, 47, 0, 7, 0, 17, 13, 53, 0, 11, 0, 19, 29, 59, 0, 61, 31, 0, 0, 13, 11, 67, 17, 23, 0, 71, 0, 73, 37, 0, 19, 11, 13, 79, 0, 0, 41, 83]

cp's OEIS Frontend

A097975 a(n) is the prime divisor of n which is >= sqrt(n), or 0 if there is no such prime divisor.

Table of values

List of values

n	a(n)
1	0
2	2
3	3
4	2
5	5
6	3
7	7
8	0
9	3
10	5
11	11
12	0
13	13
14	7
15	5
16	0
17	17
18	0
19	19
20	5
21	7
22	11
23	23
24	0
25	5
26	13
27	0
28	7
29	29
30	0
31	31
32	0
33	11
34	17
35	7
36	0
37	37
38	19
39	13
40	0
41	41
42	7
43	43
44	11
45	0
46	23
47	47
48	0
49	7
50	0
51	17
52	13
53	53
54	0
55	11
56	0
57	19
58	29
59	59
60	0
61	61
62	31
63	0
64	0
65	13
66	11
67	67
68	17
69	23
70	0
71	71
72	0
73	73
74	37
75	0
76	19
77	11
78	13
79	79
80	0
81	0
82	41
83	83

n	a(n)
1	0
2	2
3	3
4	2
5	5
6	3
7	7
8	0
9	3
10	5
11	11
12	0
13	13
14	7
15	5
16	0
17	17
18	0
19	19
20	5
21	7
22	11
23	23
24	0
25	5
26	13
27	0
28	7
29	29
30	0
31	31
32	0
33	11
34	17
35	7
36	0
37	37
38	19
39	13
40	0
41	41
42	7
43	43
44	11
45	0
46	23
47	47
48	0
49	7
50	0
51	17
52	13
53	53
54	0
55	11
56	0
57	19
58	29
59	59
60	0
61	61
62	31
63	0
64	0
65	13
66	11
67	67
68	17
69	23
70	0
71	71
72	0
73	73
74	37
75	0
76	19
77	11
78	13
79	79
80	0
81	0
82	41
83	83

n	a(n)
1	0
2	2
3	3
4	2
5	5
6	3
7	7
8	0
9	3
10	5
11	11
12	0
13	13
14	7
15	5
16	0
17	17
18	0
19	19
20	5
21	7
22	11
23	23
24	0
25	5
26	13
27	0
28	7
29	29
30	0
31	31
32	0
33	11
34	17
35	7
36	0
37	37
38	19
39	13
40	0
41	41
42	7
43	43
44	11
45	0
46	23
47	47
48	0
49	7
50	0
51	17
52	13
53	53
54	0
55	11
56	0
57	19
58	29
59	59
60	0
61	61
62	31
63	0
64	0
65	13
66	11
67	67
68	17
69	23
70	0
71	71
72	0
73	73
74	37
75	0
76	19
77	11
78	13
79	79
80	0
81	0
82	41
83	83