28921347

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:257

約数の個数: 64

約数和(自身を含む): 53760000

約数和(自身を除く): 24838653

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 79, 91, 117, 149, 189, 237, 273, 351, 447, 553, 711, 819, 1027, 1043, 1341, 1659, 1937, 2133, 2457, 3081, 3129, 4023, 4977, 5811, 7189, 9243, 9387, 11771, 13559, 14931, 17433, 21567, 27729, 28161, 35313, 40677, 52299, 64701, 82397, 105939, 122031, 153023, 194103, 247191, 317817, 366093, 459069, 741573, 1071161, 1377207, 2224719, 3213483, 4131621, 9640449, 28921347]

約数ペア:

[(1, 28921347), (3, 9640449), (7, 4131621), (9, 3213483), (13, 2224719), (21, 1377207), (27, 1071161), (39, 741573), (63, 459069), (79, 366093), (91, 317817), (117, 247191), (149, 194103), (189, 153023), (237, 122031), (273, 105939), (351, 82397), (447, 64701), (553, 52299), (711, 40677), (819, 35313), (1027, 28161), (1043, 27729), (1341, 21567), (1659, 17433), (1937, 14931), (2133, 13559), (2457, 11771), (3081, 9387), (3129, 9243), (4023, 7189), (4977, 5811)]