20967903

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{233}}^1$

素因数の和:357

約数の個数: 40

約数和(自身を含む): 34656336

約数和(自身を除く): 13688433

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 101, 233, 297, 303, 699, 891, 909, 1111, 2097, 2563, 2727, 3333, 6291, 7689, 8181, 9999, 18873, 23067, 23533, 29997, 69201, 70599, 89991, 207603, 211797, 258863, 635391, 776589, 1906173, 2329767, 6989301, 20967903]

約数ペア:

[(1, 20967903), (3, 6989301), (9, 2329767), (11, 1906173), (27, 776589), (33, 635391), (81, 258863), (99, 211797), (101, 207603), (233, 89991), (297, 70599), (303, 69201), (699, 29997), (891, 23533), (909, 23067), (1111, 18873), (2097, 9999), (2563, 8181), (2727, 7689), (3333, 6291)]