19956112

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1597}}^1$

素因数の和:1687

約数の個数: 40

約数和(自身を含む): 42800832

約数和(自身を除く): 22844720

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 71, 88, 142, 176, 284, 568, 781, 1136, 1562, 1597, 3124, 3194, 6248, 6388, 12496, 12776, 17567, 25552, 35134, 70268, 113387, 140536, 226774, 281072, 453548, 907096, 1247257, 1814192, 2494514, 4989028, 9978056, 19956112]

約数ペア:

[(1, 19956112), (2, 9978056), (4, 4989028), (8, 2494514), (11, 1814192), (16, 1247257), (22, 907096), (44, 453548), (71, 281072), (88, 226774), (142, 140536), (176, 113387), (284, 70268), (568, 35134), (781, 25552), (1136, 17567), (1562, 12776), (1597, 12496), (3124, 6388), (3194, 6248)]