19865871

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:364

約数の個数: 32

約数和(自身を含む): 30666240

約数和(自身を除く): 10800369

約数列:

[1, 3, 9, 27, 43, 71, 129, 213, 241, 387, 639, 723, 1161, 1917, 2169, 3053, 6507, 9159, 10363, 17111, 27477, 31089, 51333, 82431, 93267, 153999, 279801, 461997, 735773, 2207319, 6621957, 19865871]

約数ペア:

[(1, 19865871), (3, 6621957), (9, 2207319), (27, 735773), (43, 461997), (71, 279801), (129, 153999), (213, 93267), (241, 82431), (387, 51333), (639, 31089), (723, 27477), (1161, 17111), (1917, 10363), (2169, 9159), (3053, 6507)]