21336939

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{881}}^1$

素因数の和:929

約数の個数: 40

約数和(自身を含む): 35858592

約数和(自身を除く): 14521653

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 117, 207, 299, 351, 621, 881, 897, 1053, 1863, 2643, 2691, 7929, 8073, 11453, 20263, 23787, 24219, 34359, 60789, 71361, 103077, 182367, 263419, 309231, 547101, 790257, 927693, 1641303, 2370771, 7112313, 21336939]

約数ペア:

[(1, 21336939), (3, 7112313), (9, 2370771), (13, 1641303), (23, 927693), (27, 790257), (39, 547101), (69, 309231), (81, 263419), (117, 182367), (207, 103077), (299, 71361), (351, 60789), (621, 34359), (881, 24219), (897, 23787), (1053, 20263), (1863, 11453), (2643, 8073), (2691, 7929)]