261781521

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1\times {\mathrm{673}}^1$

素因数の和:985

約数の個数: 32

約数和(自身を含む): 384341760

約数和(自身を除く): 122560239

約数列:

[1, 3, 17, 29, 51, 87, 263, 493, 673, 789, 1479, 2019, 4471, 7627, 11441, 13413, 19517, 22881, 34323, 58551, 129659, 176999, 331789, 388977, 530997, 995367, 3008983, 5132971, 9026949, 15398913, 87260507, 261781521]

約数ペア:

[(1, 261781521), (3, 87260507), (17, 15398913), (29, 9026949), (51, 5132971), (87, 3008983), (263, 995367), (493, 530997), (673, 388977), (789, 331789), (1479, 176999), (2019, 129659), (4471, 58551), (7627, 34323), (11441, 22881), (13413, 19517)]