21902409

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:186

約数の個数: 48

約数和(自身を含む): 35532432

約数和(自身を除く): 13630023

約数列:

[1, 3, 9, 17, 37, 51, 53, 73, 111, 153, 159, 219, 333, 477, 629, 657, 901, 1241, 1887, 1961, 2701, 2703, 3723, 3869, 5661, 5883, 8103, 8109, 11169, 11607, 17649, 24309, 33337, 34821, 45917, 65773, 100011, 137751, 143153, 197319, 300033, 413253, 429459, 591957, 1288377, 2433601, 7300803, 21902409]

約数ペア:

[(1, 21902409), (3, 7300803), (9, 2433601), (17, 1288377), (37, 591957), (51, 429459), (53, 413253), (73, 300033), (111, 197319), (153, 143153), (159, 137751), (219, 100011), (333, 65773), (477, 45917), (629, 34821), (657, 33337), (901, 24309), (1241, 17649), (1887, 11607), (1961, 11169), (2701, 8109), (2703, 8103), (3723, 5883), (3869, 5661)]