1878778900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{4969}}^1$

素因数の和:5201

約数の個数: 72

約数和(自身を含む): 4313960000

約数和(自身を除く): 2435181100

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 199, 380, 398, 475, 796, 950, 995, 1900, 1990, 3781, 3980, 4969, 4975, 7562, 9938, 9950, 15124, 18905, 19876, 19900, 24845, 37810, 49690, 75620, 94411, 94525, 99380, 124225, 188822, 189050, 248450, 377644, 378100, 472055, 496900, 944110, 988831, 1888220, 1977662, 2360275, 3955324, 4720550, 4944155, 9441100, 9888310, 18787789, 19776620, 24720775, 37575578, 49441550, 75151156, 93938945, 98883100, 187877890, 375755780, 469694725, 939389450, 1878778900]

約数ペア:

[(1, 1878778900), (2, 939389450), (4, 469694725), (5, 375755780), (10, 187877890), (19, 98883100), (20, 93938945), (25, 75151156), (38, 49441550), (50, 37575578), (76, 24720775), (95, 19776620), (100, 18787789), (190, 9888310), (199, 9441100), (380, 4944155), (398, 4720550), (475, 3955324), (796, 2360275), (950, 1977662), (995, 1888220), (1900, 988831), (1990, 944110), (3781, 496900), (3980, 472055), (4969, 378100), (4975, 377644), (7562, 248450), (9938, 189050), (9950, 188822), (15124, 124225), (18905, 99380), (19876, 94525), (19900, 94411), (24845, 75620), (37810, 49690)]