819880

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:313

約数の個数: 32

約数和(自身を含む): 1872000

約数和(自身を除く): 1052120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 199, 206, 398, 412, 515, 796, 824, 995, 1030, 1592, 1990, 2060, 3980, 4120, 7960, 20497, 40994, 81988, 102485, 163976, 204970, 409940, 819880]

約数ペア:

[(1, 819880), (2, 409940), (4, 204970), (5, 163976), (8, 102485), (10, 81988), (20, 40994), (40, 20497), (103, 7960), (199, 4120), (206, 3980), (398, 2060), (412, 1990), (515, 1592), (796, 1030), (824, 995)]