18143979

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 28790784

約数和(自身を除く): 10646805

約数列:

[1, 3, 7, 21, 43, 71, 129, 213, 283, 301, 497, 849, 903, 1491, 1981, 3053, 5943, 9159, 12169, 20093, 21371, 36507, 60279, 64113, 85183, 140651, 255549, 421953, 863999, 2591997, 6047993, 18143979]

約数ペア:

[(1, 18143979), (3, 6047993), (7, 2591997), (21, 863999), (43, 421953), (71, 255549), (129, 140651), (213, 85183), (283, 64113), (301, 60279), (497, 36507), (849, 21371), (903, 20093), (1491, 12169), (1981, 9159), (3053, 5943)]