18999560

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1361}}^1$

素因数の和:1721

約数の個数: 32

約数和(自身を含む): 42903000

約数和(自身を除く): 23903440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1361, 1396, 1745, 2722, 2792, 3490, 5444, 6805, 6980, 10888, 13610, 13960, 27220, 54440, 474989, 949978, 1899956, 2374945, 3799912, 4749890, 9499780, 18999560]

約数ペア:

[(1, 18999560), (2, 9499780), (4, 4749890), (5, 3799912), (8, 2374945), (10, 1899956), (20, 949978), (40, 474989), (349, 54440), (698, 27220), (1361, 13960), (1396, 13610), (1745, 10888), (2722, 6980), (2792, 6805), (3490, 5444)]