87428660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{1997}}^1$

素因数の和:2216

約数の個数: 48

約数和(自身を含む): 201398400

約数和(自身を除く): 113969740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 199, 220, 398, 796, 995, 1990, 1997, 2189, 3980, 3994, 4378, 7988, 8756, 9985, 10945, 19970, 21890, 21967, 39940, 43780, 43934, 87868, 109835, 219670, 397403, 439340, 794806, 1589612, 1987015, 3974030, 4371433, 7948060, 8742866, 17485732, 21857165, 43714330, 87428660]

約数ペア:

[(1, 87428660), (2, 43714330), (4, 21857165), (5, 17485732), (10, 8742866), (11, 7948060), (20, 4371433), (22, 3974030), (44, 1987015), (55, 1589612), (110, 794806), (199, 439340), (220, 397403), (398, 219670), (796, 109835), (995, 87868), (1990, 43934), (1997, 43780), (2189, 39940), (3980, 21967), (3994, 21890), (4378, 19970), (7988, 10945), (8756, 9985)]