81867775

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 116430048

約数和(自身を除く): 34562273

約数列:

[1, 5, 11, 25, 41, 53, 55, 137, 205, 265, 275, 451, 583, 685, 1025, 1325, 1507, 2173, 2255, 2915, 3425, 5617, 7261, 7535, 10865, 11275, 14575, 23903, 28085, 36305, 37675, 54325, 61787, 79871, 119515, 140425, 181525, 297701, 308935, 399355, 597575, 1488505, 1544675, 1996775, 3274711, 7442525, 16373555, 81867775]

約数ペア:

[(1, 81867775), (5, 16373555), (11, 7442525), (25, 3274711), (41, 1996775), (53, 1544675), (55, 1488505), (137, 597575), (205, 399355), (265, 308935), (275, 297701), (451, 181525), (583, 140425), (685, 119515), (1025, 79871), (1325, 61787), (1507, 54325), (2173, 37675), (2255, 36305), (2915, 28085), (3425, 23903), (5617, 14575), (7261, 11275), (7535, 10865)]