81286480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1301}}^1$

素因数の和:1396

約数の個数: 80

約数和(自身を含む): 209236608

約数和(自身を除く): 127950128

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 71, 80, 88, 110, 142, 176, 220, 284, 355, 440, 568, 710, 781, 880, 1136, 1301, 1420, 1562, 2602, 2840, 3124, 3905, 5204, 5680, 6248, 6505, 7810, 10408, 12496, 13010, 14311, 15620, 20816, 26020, 28622, 31240, 52040, 57244, 62480, 71555, 92371, 104080, 114488, 143110, 184742, 228976, 286220, 369484, 461855, 572440, 738968, 923710, 1016081, 1144880, 1477936, 1847420, 2032162, 3694840, 4064324, 5080405, 7389680, 8128648, 10160810, 16257296, 20321620, 40643240, 81286480]

約数ペア:

[(1, 81286480), (2, 40643240), (4, 20321620), (5, 16257296), (8, 10160810), (10, 8128648), (11, 7389680), (16, 5080405), (20, 4064324), (22, 3694840), (40, 2032162), (44, 1847420), (55, 1477936), (71, 1144880), (80, 1016081), (88, 923710), (110, 738968), (142, 572440), (176, 461855), (220, 369484), (284, 286220), (355, 228976), (440, 184742), (568, 143110), (710, 114488), (781, 104080), (880, 92371), (1136, 71555), (1301, 62480), (1420, 57244), (1562, 52040), (2602, 31240), (2840, 28622), (3124, 26020), (3905, 20816), (5204, 15620), (5680, 14311), (6248, 13010), (6505, 12496), (7810, 10408)]