128400016

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{258871}}^1$

素因数の和:258910

約数の個数: 20

約数和(自身を含む): 256801024

約数和(自身を除く): 128401008

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 258871, 517742, 1035484, 2070968, 4141936, 8025001, 16050002, 32100004, 64200008, 128400016]

約数ペア:

[(1, 128400016), (2, 64200008), (4, 32100004), (8, 16050002), (16, 8025001), (31, 4141936), (62, 2070968), (124, 1035484), (248, 517742), (496, 258871)]