21242559

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10690881

約数列:

[1, 3, 13, 39, 43, 53, 129, 159, 239, 559, 689, 717, 1677, 2067, 2279, 3107, 6837, 9321, 10277, 12667, 29627, 30831, 38001, 88881, 133601, 164671, 400803, 494013, 544681, 1634043, 7080853, 21242559]

約数ペア:

[(1, 21242559), (3, 7080853), (13, 1634043), (39, 544681), (43, 494013), (53, 400803), (129, 164671), (159, 133601), (239, 88881), (559, 38001), (689, 30831), (717, 29627), (1677, 12667), (2067, 10277), (2279, 9321), (3107, 6837)]