261720129

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{3019}}^1$

素因数の和:3141

約数の個数: 32

約数和(自身を含む): 396610560

約数和(自身を除く): 134890431

約数列:

[1, 3, 11, 33, 37, 71, 111, 213, 407, 781, 1221, 2343, 2627, 3019, 7881, 9057, 28897, 33209, 86691, 99627, 111703, 214349, 335109, 643047, 1228733, 2357839, 3686199, 7073517, 7930913, 23792739, 87240043, 261720129]

約数ペア:

[(1, 261720129), (3, 87240043), (11, 23792739), (33, 7930913), (37, 7073517), (71, 3686199), (111, 2357839), (213, 1228733), (407, 643047), (781, 335109), (1221, 214349), (2343, 111703), (2627, 99627), (3019, 86691), (7881, 33209), (9057, 28897)]