128175280

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{14699}}^1$

素因数の和:14821

約数の個数: 40

約数和(自身を含む): 300762000

約数和(自身を除く): 172586720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 4360, 8720, 14699, 29398, 58796, 73495, 117592, 146990, 235184, 293980, 587960, 1175920, 1602191, 3204382, 6408764, 8010955, 12817528, 16021910, 25635056, 32043820, 64087640, 128175280]

約数ペア:

[(1, 128175280), (2, 64087640), (4, 32043820), (5, 25635056), (8, 16021910), (10, 12817528), (16, 8010955), (20, 6408764), (40, 3204382), (80, 1602191), (109, 1175920), (218, 587960), (436, 293980), (545, 235184), (872, 146990), (1090, 117592), (1744, 73495), (2180, 58796), (4360, 29398), (8720, 14699)]