21098259

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1$

素因数の和:337

約数の個数: 64

約数和(自身を含む): 39854080

約数和(自身を除く): 18755821

約数列:

[1, 3, 7, 9, 13, 21, 27, 31, 39, 63, 91, 93, 117, 189, 217, 273, 277, 279, 351, 403, 651, 819, 831, 837, 1209, 1939, 1953, 2457, 2493, 2821, 3601, 3627, 5817, 5859, 7479, 8463, 8587, 10803, 10881, 17451, 25207, 25389, 25761, 32409, 52353, 60109, 75621, 76167, 77283, 97227, 111631, 180327, 226863, 231849, 334893, 540981, 680589, 781417, 1004679, 1622943, 2344251, 3014037, 7032753, 21098259]

約数ペア:

[(1, 21098259), (3, 7032753), (7, 3014037), (9, 2344251), (13, 1622943), (21, 1004679), (27, 781417), (31, 680589), (39, 540981), (63, 334893), (91, 231849), (93, 226863), (117, 180327), (189, 111631), (217, 97227), (273, 77283), (277, 76167), (279, 75621), (351, 60109), (403, 52353), (651, 32409), (819, 25761), (831, 25389), (837, 25207), (1209, 17451), (1939, 10881), (1953, 10803), (2457, 8587), (2493, 8463), (2821, 7479), (3601, 5859), (3627, 5817)]