20668000

素因数分解:

$2^5\times 5^3\times {\mathrm{5167}}^1$

素因数の和:5192

約数の個数: 48

約数和(自身を含む): 50791104

約数和(自身を除く): 30123104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5167, 10334, 20668, 25835, 41336, 51670, 82672, 103340, 129175, 165344, 206680, 258350, 413360, 516700, 645875, 826720, 1033400, 1291750, 2066800, 2583500, 4133600, 5167000, 10334000, 20668000]

約数ペア:

[(1, 20668000), (2, 10334000), (4, 5167000), (5, 4133600), (8, 2583500), (10, 2066800), (16, 1291750), (20, 1033400), (25, 826720), (32, 645875), (40, 516700), (50, 413360), (80, 258350), (100, 206680), (125, 165344), (160, 129175), (200, 103340), (250, 82672), (400, 51670), (500, 41336), (800, 25835), (1000, 20668), (2000, 10334), (4000, 5167)]