19997709

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 29568000

約数和(自身を除く): 9570291

約数列:

[1, 3, 19, 41, 43, 57, 123, 129, 199, 597, 779, 817, 1763, 2337, 2451, 3781, 5289, 8159, 8557, 11343, 24477, 25671, 33497, 100491, 155021, 162583, 350837, 465063, 487749, 1052511, 6665903, 19997709]

約数ペア:

[(1, 19997709), (3, 6665903), (19, 1052511), (41, 487749), (43, 465063), (57, 350837), (123, 162583), (129, 155021), (199, 100491), (597, 33497), (779, 25671), (817, 24477), (1763, 11343), (2337, 8557), (2451, 8159), (3781, 5289)]