21296223

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:165

約数の個数: 64

約数和(自身を含む): 37255680

約数和(自身を除く): 15959457

約数列:

[1, 3, 9, 13, 17, 27, 39, 43, 51, 83, 117, 129, 153, 221, 249, 351, 387, 459, 559, 663, 731, 747, 1079, 1161, 1411, 1677, 1989, 2193, 2241, 3237, 3569, 4233, 5031, 5967, 6579, 9503, 9711, 10707, 12699, 15093, 18343, 19737, 28509, 29133, 32121, 38097, 46397, 55029, 60673, 85527, 96363, 139191, 165087, 182019, 256581, 417573, 495261, 546057, 788749, 1252719, 1638171, 2366247, 7098741, 21296223]

約数ペア:

[(1, 21296223), (3, 7098741), (9, 2366247), (13, 1638171), (17, 1252719), (27, 788749), (39, 546057), (43, 495261), (51, 417573), (83, 256581), (117, 182019), (129, 165087), (153, 139191), (221, 96363), (249, 85527), (351, 60673), (387, 55029), (459, 46397), (559, 38097), (663, 32121), (731, 29133), (747, 28509), (1079, 19737), (1161, 18343), (1411, 15093), (1677, 12699), (1989, 10707), (2193, 9711), (2241, 9503), (3237, 6579), (3569, 5967), (4233, 5031)]