18987794

素因数分解:

$2^1\times 7^3\times {\mathrm{89}}^1\times {\mathrm{311}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 33696000

約数和(自身を除く): 14708206

約数列:

[1, 2, 7, 14, 49, 89, 98, 178, 311, 343, 622, 623, 686, 1246, 2177, 4354, 4361, 8722, 15239, 27679, 30478, 30527, 55358, 61054, 106673, 193753, 213346, 387506, 1356271, 2712542, 9493897, 18987794]

約数ペア:

[(1, 18987794), (2, 9493897), (7, 2712542), (14, 1356271), (49, 387506), (89, 213346), (98, 193753), (178, 106673), (311, 61054), (343, 55358), (622, 30527), (623, 30478), (686, 27679), (1246, 15239), (2177, 8722), (4354, 4361)]