18613539

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{6871}}^1$

素因数の和:6927

約数の個数: 24

約数和(自身を含む): 31446272

約数和(自身を除く): 12832733

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 6871, 20613, 48097, 61839, 144291, 295453, 432873, 886359, 2068171, 2659077, 6204513, 18613539]

約数ペア:

[(1, 18613539), (3, 6204513), (7, 2659077), (9, 2068171), (21, 886359), (43, 432873), (63, 295453), (129, 144291), (301, 61839), (387, 48097), (903, 20613), (2709, 6871)]