19800500

素因数分解:

$2^2\times 5^3\times {\mathrm{199}}^2$

素因数の和:417

約数の個数: 36

約数和(自身を含む): 43462692

約数和(自身を除く): 23662192

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 199, 250, 398, 500, 796, 995, 1990, 3980, 4975, 9950, 19900, 24875, 39601, 49750, 79202, 99500, 158404, 198005, 396010, 792020, 990025, 1980050, 3960100, 4950125, 9900250, 19800500]

約数ペア:

[(1, 19800500), (2, 9900250), (4, 4950125), (5, 3960100), (10, 1980050), (20, 990025), (25, 792020), (50, 396010), (100, 198005), (125, 158404), (199, 99500), (250, 79202), (398, 49750), (500, 39601), (796, 24875), (995, 19900), (1990, 9950), (3980, 4975)]