20389968123

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1087291}}^1$

素因数の和:1087367

約数の個数: 32

約数和(自身を含む): 33401610240

約数和(自身を除く): 13011642117

約数列:

[1, 3, 7, 19, 21, 47, 57, 133, 141, 329, 399, 893, 987, 2679, 6251, 18753, 1087291, 3261873, 7611037, 20658529, 22833111, 51102677, 61975587, 144609703, 153308031, 357718739, 433829109, 970950863, 1073156217, 2912852589, 6796656041, 20389968123]

約数ペア:

[(1, 20389968123), (3, 6796656041), (7, 2912852589), (19, 1073156217), (21, 970950863), (47, 433829109), (57, 357718739), (133, 153308031), (141, 144609703), (329, 61975587), (399, 51102677), (893, 22833111), (987, 20658529), (2679, 7611037), (6251, 3261873), (18753, 1087291)]