18240729

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 27350400

約数和(自身を除く): 9109671

約数列:

[1, 3, 13, 39, 43, 73, 129, 149, 219, 447, 559, 949, 1677, 1937, 2847, 3139, 5811, 6407, 9417, 10877, 19221, 32631, 40807, 83291, 122421, 141401, 249873, 424203, 467711, 1403133, 6080243, 18240729]

約数ペア:

[(1, 18240729), (3, 6080243), (13, 1403133), (39, 467711), (43, 424203), (73, 249873), (129, 141401), (149, 122421), (219, 83291), (447, 40807), (559, 32631), (949, 19221), (1677, 10877), (1937, 9417), (2847, 6407), (3139, 5811)]