21810159

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 37669632

約数和(自身を除く): 15859473

約数列:

[1, 3, 7, 9, 21, 43, 63, 83, 97, 129, 249, 291, 301, 387, 581, 679, 747, 873, 903, 1743, 2037, 2709, 3569, 4171, 5229, 6111, 8051, 10707, 12513, 24153, 24983, 29197, 32121, 37539, 56357, 72459, 74949, 87591, 169071, 224847, 262773, 346193, 507213, 1038579, 2423351, 3115737, 7270053, 21810159]

約数ペア:

[(1, 21810159), (3, 7270053), (7, 3115737), (9, 2423351), (21, 1038579), (43, 507213), (63, 346193), (83, 262773), (97, 224847), (129, 169071), (249, 87591), (291, 74949), (301, 72459), (387, 56357), (581, 37539), (679, 32121), (747, 29197), (873, 24983), (903, 24153), (1743, 12513), (2037, 10707), (2709, 8051), (3569, 6111), (4171, 5229)]