31921520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{21001}}^1$

素因数の和:21033

約数の個数: 40

約数和(自身を含む): 78127440

約数和(自身を除く): 46205920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 21001, 42002, 84004, 105005, 168008, 210010, 336016, 399019, 420020, 798038, 840040, 1596076, 1680080, 1995095, 3192152, 3990190, 6384304, 7980380, 15960760, 31921520]

約数ペア:

[(1, 31921520), (2, 15960760), (4, 7980380), (5, 6384304), (8, 3990190), (10, 3192152), (16, 1995095), (19, 1680080), (20, 1596076), (38, 840040), (40, 798038), (76, 420020), (80, 399019), (95, 336016), (152, 210010), (190, 168008), (304, 105005), (380, 84004), (760, 42002), (1520, 21001)]