387981520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{255251}}^1$

素因数の和:255283

約数の個数: 40

約数和(自身を含む): 949537440

約数和(自身を除く): 561555920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 255251, 510502, 1021004, 1276255, 2042008, 2552510, 4084016, 4849769, 5105020, 9699538, 10210040, 19399076, 20420080, 24248845, 38798152, 48497690, 77596304, 96995380, 193990760, 387981520]

約数ペア:

[(1, 387981520), (2, 193990760), (4, 96995380), (5, 77596304), (8, 48497690), (10, 38798152), (16, 24248845), (19, 20420080), (20, 19399076), (38, 10210040), (40, 9699538), (76, 5105020), (80, 4849769), (95, 4084016), (152, 2552510), (190, 2042008), (304, 1276255), (380, 1021004), (760, 510502), (1520, 255251)]