81976060

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{479}}^1$

素因数の和:730

約数の個数: 48

約数和(自身を含む): 177408000

約数和(自身を除く): 95431940

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 199, 215, 398, 430, 479, 796, 860, 958, 995, 1916, 1990, 2395, 3980, 4790, 8557, 9580, 17114, 20597, 34228, 41194, 42785, 82388, 85570, 95321, 102985, 171140, 190642, 205970, 381284, 411940, 476605, 953210, 1906420, 4098803, 8197606, 16395212, 20494015, 40988030, 81976060]

約数ペア:

[(1, 81976060), (2, 40988030), (4, 20494015), (5, 16395212), (10, 8197606), (20, 4098803), (43, 1906420), (86, 953210), (172, 476605), (199, 411940), (215, 381284), (398, 205970), (430, 190642), (479, 171140), (796, 102985), (860, 95321), (958, 85570), (995, 82388), (1916, 42785), (1990, 41194), (2395, 34228), (3980, 20597), (4790, 17114), (8557, 9580)]