20928908

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5227}}^1$

素因数の和:5262

約数の個数: 48

約数和(自身を含む): 49185024

約数和(自身を除く): 28256116

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 2002, 4004, 5227, 10454, 20908, 36589, 57497, 67951, 73178, 114994, 135902, 146356, 229988, 271804, 402479, 475657, 747461, 804958, 951314, 1494922, 1609916, 1902628, 2989844, 5232227, 10464454, 20928908]

約数ペア:

[(1, 20928908), (2, 10464454), (4, 5232227), (7, 2989844), (11, 1902628), (13, 1609916), (14, 1494922), (22, 951314), (26, 804958), (28, 747461), (44, 475657), (52, 402479), (77, 271804), (91, 229988), (143, 146356), (154, 135902), (182, 114994), (286, 73178), (308, 67951), (364, 57497), (572, 36589), (1001, 20908), (2002, 10454), (4004, 5227)]