20321620

素因数分解:

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

素因数の和:1392

約数の個数: 48

約数和(自身を含む): 47246976

約数和(自身を除く): 26925356

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 142, 220, 284, 355, 710, 781, 1301, 1420, 1562, 2602, 3124, 3905, 5204, 6505, 7810, 13010, 14311, 15620, 26020, 28622, 57244, 71555, 92371, 143110, 184742, 286220, 369484, 461855, 923710, 1016081, 1847420, 2032162, 4064324, 5080405, 10160810, 20321620]

約数ペア:

[(1, 20321620), (2, 10160810), (4, 5080405), (5, 4064324), (10, 2032162), (11, 1847420), (20, 1016081), (22, 923710), (44, 461855), (55, 369484), (71, 286220), (110, 184742), (142, 143110), (220, 92371), (284, 71555), (355, 57244), (710, 28622), (781, 26020), (1301, 15620), (1420, 14311), (1562, 13010), (2602, 7810), (3124, 6505), (3905, 5204)]