20511855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5009}}^1$

素因数の和:5040

約数の個数: 48

約数和(自身を含む): 43767360

約数和(自身を除く): 23255505

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 195, 273, 315, 455, 585, 819, 1365, 4095, 5009, 15027, 25045, 35063, 45081, 65117, 75135, 105189, 175315, 195351, 225405, 315567, 325585, 455819, 525945, 586053, 976755, 1367457, 1577835, 2279095, 2930265, 4102371, 6837285, 20511855]

約数ペア:

[(1, 20511855), (3, 6837285), (5, 4102371), (7, 2930265), (9, 2279095), (13, 1577835), (15, 1367457), (21, 976755), (35, 586053), (39, 525945), (45, 455819), (63, 325585), (65, 315567), (91, 225405), (105, 195351), (117, 175315), (195, 105189), (273, 75135), (315, 65117), (455, 45081), (585, 35063), (819, 25045), (1365, 15027), (4095, 5009)]