257881312

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{19997}}^1$

素因数の和:20051

約数の個数: 48

約数和(自身を含む): 564423552

約数和(自身を除く): 306542240

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 104, 124, 208, 248, 403, 416, 496, 806, 992, 1612, 3224, 6448, 12896, 19997, 39994, 79988, 159976, 259961, 319952, 519922, 619907, 639904, 1039844, 1239814, 2079688, 2479628, 4159376, 4959256, 8058791, 8318752, 9918512, 16117582, 19837024, 32235164, 64470328, 128940656, 257881312]

約数ペア:

[(1, 257881312), (2, 128940656), (4, 64470328), (8, 32235164), (13, 19837024), (16, 16117582), (26, 9918512), (31, 8318752), (32, 8058791), (52, 4959256), (62, 4159376), (104, 2479628), (124, 2079688), (208, 1239814), (248, 1039844), (403, 639904), (416, 619907), (496, 519922), (806, 319952), (992, 259961), (1612, 159976), (3224, 79988), (6448, 39994), (12896, 19997)]