21000901250

素因数分解:

$2^1\times 5^4\times 7^1\times {\mathrm{137}}^1\times {\mathrm{17519}}^1$

素因数の和:17685

約数の個数: 80

約数和(自身を含む): 45318493440

約数和(自身を除く): 24317592190

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 125, 137, 175, 250, 274, 350, 625, 685, 875, 959, 1250, 1370, 1750, 1918, 3425, 4375, 4795, 6850, 8750, 9590, 17125, 17519, 23975, 34250, 35038, 47950, 85625, 87595, 119875, 122633, 171250, 175190, 239750, 245266, 437975, 599375, 613165, 875950, 1198750, 1226330, 2189875, 2400103, 3065825, 4379750, 4800206, 6131650, 10949375, 12000515, 15329125, 16800721, 21898750, 24001030, 30658250, 33601442, 60002575, 76645625, 84003605, 120005150, 153291250, 168007210, 300012875, 420018025, 600025750, 840036050, 1500064375, 2100090125, 3000128750, 4200180250, 10500450625, 21000901250]

約数ペア:

[(1, 21000901250), (2, 10500450625), (5, 4200180250), (7, 3000128750), (10, 2100090125), (14, 1500064375), (25, 840036050), (35, 600025750), (50, 420018025), (70, 300012875), (125, 168007210), (137, 153291250), (175, 120005150), (250, 84003605), (274, 76645625), (350, 60002575), (625, 33601442), (685, 30658250), (875, 24001030), (959, 21898750), (1250, 16800721), (1370, 15329125), (1750, 12000515), (1918, 10949375), (3425, 6131650), (4375, 4800206), (4795, 4379750), (6850, 3065825), (8750, 2400103), (9590, 2189875), (17125, 1226330), (17519, 1198750), (23975, 875950), (34250, 613165), (35038, 599375), (47950, 437975), (85625, 245266), (87595, 239750), (119875, 175190), (122633, 171250)]