21203559

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{193}}^1\times {\mathrm{313}}^1$

素因数の和:528

約数の個数: 32

約数和(自身を含む): 34112960

約数和(自身を除く): 12909401

約数列:

[1, 3, 9, 13, 27, 39, 117, 193, 313, 351, 579, 939, 1737, 2509, 2817, 4069, 5211, 7527, 8451, 12207, 22581, 36621, 60409, 67743, 109863, 181227, 543681, 785317, 1631043, 2355951, 7067853, 21203559]

約数ペア:

[(1, 21203559), (3, 7067853), (9, 2355951), (13, 1631043), (27, 785317), (39, 543681), (117, 181227), (193, 109863), (313, 67743), (351, 60409), (579, 36621), (939, 22581), (1737, 12207), (2509, 8451), (2817, 7527), (4069, 5211)]