20904795

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{193}}^1$

素因数の和:316

約数の個数: 48

約数和(自身を含む): 38132640

約数和(自身を除く): 17227845

約数列:

[1, 3, 5, 9, 15, 29, 45, 83, 87, 145, 193, 249, 261, 415, 435, 579, 747, 965, 1245, 1305, 1737, 2407, 2895, 3735, 5597, 7221, 8685, 12035, 16019, 16791, 21663, 27985, 36105, 48057, 50373, 80095, 83955, 108315, 144171, 240285, 251865, 464551, 720855, 1393653, 2322755, 4180959, 6968265, 20904795]

約数ペア:

[(1, 20904795), (3, 6968265), (5, 4180959), (9, 2322755), (15, 1393653), (29, 720855), (45, 464551), (83, 251865), (87, 240285), (145, 144171), (193, 108315), (249, 83955), (261, 80095), (415, 50373), (435, 48057), (579, 36105), (747, 27985), (965, 21663), (1245, 16791), (1305, 16019), (1737, 12035), (2407, 8685), (2895, 7221), (3735, 5597)]