19902507

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:211

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 8837589

約数列:

[1, 3, 41, 43, 53, 71, 123, 129, 159, 213, 1763, 2173, 2279, 2911, 3053, 3763, 5289, 6519, 6837, 8733, 9159, 11289, 93439, 125173, 154283, 161809, 280317, 375519, 462849, 485427, 6634169, 19902507]

約数ペア:

[(1, 19902507), (3, 6634169), (41, 485427), (43, 462849), (53, 375519), (71, 280317), (123, 161809), (129, 154283), (159, 125173), (213, 93439), (1763, 11289), (2173, 9159), (2279, 8733), (2911, 6837), (3053, 6519), (3763, 5289)]