1284656440

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^2\times {\mathrm{811}}^1$

素因数の和:1220

約数の個数: 48

約数和(自身を含む): 2908657080

約数和(自身を除く): 1624000640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 811, 995, 1592, 1622, 1990, 3244, 3980, 4055, 6488, 7960, 8110, 16220, 32440, 39601, 79202, 158404, 161389, 198005, 316808, 322778, 396010, 645556, 792020, 806945, 1291112, 1584040, 1613890, 3227780, 6455560, 32116411, 64232822, 128465644, 160582055, 256931288, 321164110, 642328220, 1284656440]

約数ペア:

[(1, 1284656440), (2, 642328220), (4, 321164110), (5, 256931288), (8, 160582055), (10, 128465644), (20, 64232822), (40, 32116411), (199, 6455560), (398, 3227780), (796, 1613890), (811, 1584040), (995, 1291112), (1592, 806945), (1622, 792020), (1990, 645556), (3244, 396010), (3980, 322778), (4055, 316808), (6488, 198005), (7960, 161389), (8110, 158404), (16220, 79202), (32440, 39601)]