81820720

素因数分解:

$2^4\times 5^1\times {\mathrm{701}}^1\times {\mathrm{1459}}^1$

素因数の和:2173

約数の個数: 40

約数和(自身を含む): 190635120

約数和(自身を除く): 108814400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 701, 1402, 1459, 2804, 2918, 3505, 5608, 5836, 7010, 7295, 11216, 11672, 14020, 14590, 23344, 28040, 29180, 56080, 58360, 116720, 1022759, 2045518, 4091036, 5113795, 8182072, 10227590, 16364144, 20455180, 40910360, 81820720]

約数ペア:

[(1, 81820720), (2, 40910360), (4, 20455180), (5, 16364144), (8, 10227590), (10, 8182072), (16, 5113795), (20, 4091036), (40, 2045518), (80, 1022759), (701, 116720), (1402, 58360), (1459, 56080), (2804, 29180), (2918, 28040), (3505, 23344), (5608, 14590), (5836, 14020), (7010, 11672), (7295, 11216)]