261242128

素因数分解:

$2^4\times 7^2\times {\mathrm{17}}^2\times {\mathrm{1153}}^1$

素因数の和:1209

約数の個数: 90

約数和(自身を含む): 626009226

約数和(自身を除く): 364767098

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 49, 56, 68, 98, 112, 119, 136, 196, 238, 272, 289, 392, 476, 578, 784, 833, 952, 1153, 1156, 1666, 1904, 2023, 2306, 2312, 3332, 4046, 4612, 4624, 6664, 8071, 8092, 9224, 13328, 14161, 16142, 16184, 18448, 19601, 28322, 32284, 32368, 39202, 56497, 56644, 64568, 78404, 112994, 113288, 129136, 137207, 156808, 225988, 226576, 274414, 313616, 333217, 451976, 548828, 666434, 903952, 960449, 1097656, 1332868, 1920898, 2195312, 2332519, 2665736, 3841796, 4665038, 5331472, 7683592, 9330076, 15367184, 16327633, 18660152, 32655266, 37320304, 65310532, 130621064, 261242128]

約数ペア:

[(1, 261242128), (2, 130621064), (4, 65310532), (7, 37320304), (8, 32655266), (14, 18660152), (16, 16327633), (17, 15367184), (28, 9330076), (34, 7683592), (49, 5331472), (56, 4665038), (68, 3841796), (98, 2665736), (112, 2332519), (119, 2195312), (136, 1920898), (196, 1332868), (238, 1097656), (272, 960449), (289, 903952), (392, 666434), (476, 548828), (578, 451976), (784, 333217), (833, 313616), (952, 274414), (1153, 226576), (1156, 225988), (1666, 156808), (1904, 137207), (2023, 129136), (2306, 113288), (2312, 112994), (3332, 78404), (4046, 64568), (4612, 56644), (4624, 56497), (6664, 39202), (8071, 32368), (8092, 32284), (9224, 28322), (13328, 19601), (14161, 18448), (16142, 16184)]