18913335

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:188

約数の個数: 64

約数和(自身を含む): 36495360

約数和(自身を除く): 17582025

約数列:

[1, 3, 5, 7, 15, 21, 35, 43, 59, 71, 105, 129, 177, 213, 215, 295, 301, 355, 413, 497, 645, 885, 903, 1065, 1239, 1491, 1505, 2065, 2485, 2537, 3053, 4189, 4515, 6195, 7455, 7611, 9159, 12567, 12685, 15265, 17759, 20945, 21371, 29323, 38055, 45795, 53277, 62835, 64113, 87969, 88795, 106855, 146615, 180127, 266385, 320565, 439845, 540381, 900635, 1260889, 2701905, 3782667, 6304445, 18913335]

約数ペア:

[(1, 18913335), (3, 6304445), (5, 3782667), (7, 2701905), (15, 1260889), (21, 900635), (35, 540381), (43, 439845), (59, 320565), (71, 266385), (105, 180127), (129, 146615), (177, 106855), (213, 88795), (215, 87969), (295, 64113), (301, 62835), (355, 53277), (413, 45795), (497, 38055), (645, 29323), (885, 21371), (903, 20945), (1065, 17759), (1239, 15265), (1491, 12685), (1505, 12567), (2065, 9159), (2485, 7611), (2537, 7455), (3053, 6195), (4189, 4515)]