199911257

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1087}}^1$

素因数の和:1197

約数の個数: 32

約数和(自身を含む): 257359872

約数和(自身を除く): 57448615

約数列:

[1, 7, 13, 43, 47, 91, 301, 329, 559, 611, 1087, 2021, 3913, 4277, 7609, 14131, 14147, 26273, 46741, 51089, 98917, 183911, 327187, 357623, 607633, 664157, 2196827, 4253431, 4649099, 15377789, 28558751, 199911257]

約数ペア:

[(1, 199911257), (7, 28558751), (13, 15377789), (43, 4649099), (47, 4253431), (91, 2196827), (301, 664157), (329, 607633), (559, 357623), (611, 327187), (1087, 183911), (2021, 98917), (3913, 51089), (4277, 46741), (7609, 26273), (14131, 14147)]