128940656

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{19997}}^1$

素因数の和:20049

約数の個数: 40

約数和(自身を含む): 277732224

約数和(自身を除く): 148791568

約数列:

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

約数ペア:

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