20520136

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:494

約数の個数: 64

約数和(自身を含む): 48142080

約数和(自身を除く): 27621944

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 71, 91, 104, 142, 182, 284, 364, 397, 497, 568, 728, 794, 923, 994, 1588, 1846, 1988, 2779, 3176, 3692, 3976, 5161, 5558, 6461, 7384, 10322, 11116, 12922, 20644, 22232, 25844, 28187, 36127, 41288, 51688, 56374, 72254, 112748, 144508, 197309, 225496, 289016, 366431, 394618, 732862, 789236, 1465724, 1578472, 2565017, 2931448, 5130034, 10260068, 20520136]

約数ペア:

[(1, 20520136), (2, 10260068), (4, 5130034), (7, 2931448), (8, 2565017), (13, 1578472), (14, 1465724), (26, 789236), (28, 732862), (52, 394618), (56, 366431), (71, 289016), (91, 225496), (104, 197309), (142, 144508), (182, 112748), (284, 72254), (364, 56374), (397, 51688), (497, 41288), (568, 36127), (728, 28187), (794, 25844), (923, 22232), (994, 20644), (1588, 12922), (1846, 11116), (1988, 10322), (2779, 7384), (3176, 6461), (3692, 5558), (3976, 5161)]