81578060

素因数分解:

$2^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{199}}^2$

素因数の和:510

約数の個数: 36

約数和(自身を含む): 173850768

約数和(自身を除く): 92272708

約数列:

[1, 2, 4, 5, 10, 20, 103, 199, 206, 398, 412, 515, 796, 995, 1030, 1990, 2060, 3980, 20497, 39601, 40994, 79202, 81988, 102485, 158404, 198005, 204970, 396010, 409940, 792020, 4078903, 8157806, 16315612, 20394515, 40789030, 81578060]

約数ペア:

[(1, 81578060), (2, 40789030), (4, 20394515), (5, 16315612), (10, 8157806), (20, 4078903), (103, 792020), (199, 409940), (206, 396010), (398, 204970), (412, 198005), (515, 158404), (796, 102485), (995, 81988), (1030, 79202), (1990, 40994), (2060, 39601), (3980, 20497)]