21555261

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{283}}^1$

素因数の和:343

約数の個数: 64

約数和(自身を含む): 40714240

約数和(自身を除く): 19158979

約数列:

[1, 3, 7, 9, 13, 21, 27, 31, 39, 63, 91, 93, 117, 189, 217, 273, 279, 283, 351, 403, 651, 819, 837, 849, 1209, 1953, 1981, 2457, 2547, 2821, 3627, 3679, 5859, 5943, 7641, 8463, 8773, 10881, 11037, 17829, 25389, 25753, 26319, 33111, 53487, 61411, 76167, 77259, 78957, 99333, 114049, 184233, 231777, 236871, 342147, 552699, 695331, 798343, 1026441, 1658097, 2395029, 3079323, 7185087, 21555261]

約数ペア:

[(1, 21555261), (3, 7185087), (7, 3079323), (9, 2395029), (13, 1658097), (21, 1026441), (27, 798343), (31, 695331), (39, 552699), (63, 342147), (91, 236871), (93, 231777), (117, 184233), (189, 114049), (217, 99333), (273, 78957), (279, 77259), (283, 76167), (351, 61411), (403, 53487), (651, 33111), (819, 26319), (837, 25753), (849, 25389), (1209, 17829), (1953, 11037), (1981, 10881), (2457, 8773), (2547, 8463), (2821, 7641), (3627, 5943), (3679, 5859)]