815900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:254

約数の個数: 36

約数和(自身を含む): 1822800

約数和(自身を除く): 1006900

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 199, 205, 398, 410, 796, 820, 995, 1025, 1990, 2050, 3980, 4100, 4975, 8159, 9950, 16318, 19900, 32636, 40795, 81590, 163180, 203975, 407950, 815900]

約数ペア:

[(1, 815900), (2, 407950), (4, 203975), (5, 163180), (10, 81590), (20, 40795), (25, 32636), (41, 19900), (50, 16318), (82, 9950), (100, 8159), (164, 4975), (199, 4100), (205, 3980), (398, 2050), (410, 1990), (796, 1025), (820, 995)]