20121228

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1279}}^1$

素因数の和:1331

約数の個数: 72

約数和(自身を含む): 55910400

約数和(自身を除く): 35789172

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 23, 36, 38, 46, 57, 69, 76, 92, 114, 138, 171, 207, 228, 276, 342, 414, 437, 684, 828, 874, 1279, 1311, 1748, 2558, 2622, 3837, 3933, 5116, 5244, 7674, 7866, 11511, 15348, 15732, 23022, 24301, 29417, 46044, 48602, 58834, 72903, 88251, 97204, 117668, 145806, 176502, 218709, 264753, 291612, 353004, 437418, 529506, 558923, 874836, 1059012, 1117846, 1676769, 2235692, 3353538, 5030307, 6707076, 10060614, 20121228]

約数ペア:

[(1, 20121228), (2, 10060614), (3, 6707076), (4, 5030307), (6, 3353538), (9, 2235692), (12, 1676769), (18, 1117846), (19, 1059012), (23, 874836), (36, 558923), (38, 529506), (46, 437418), (57, 353004), (69, 291612), (76, 264753), (92, 218709), (114, 176502), (138, 145806), (171, 117668), (207, 97204), (228, 88251), (276, 72903), (342, 58834), (414, 48602), (437, 46044), (684, 29417), (828, 24301), (874, 23022), (1279, 15732), (1311, 15348), (1748, 11511), (2558, 7866), (2622, 7674), (3837, 5244), (3933, 5116)]