20079100

素因数分解:

$2^2\times 5^2\times {\mathrm{199}}^1\times {\mathrm{1009}}^1$

素因数の和:1222

約数の個数: 36

約数和(自身を含む): 43834000

約数和(自身を除く): 23754900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199, 398, 796, 995, 1009, 1990, 2018, 3980, 4036, 4975, 5045, 9950, 10090, 19900, 20180, 25225, 50450, 100900, 200791, 401582, 803164, 1003955, 2007910, 4015820, 5019775, 10039550, 20079100]

約数ペア:

[(1, 20079100), (2, 10039550), (4, 5019775), (5, 4015820), (10, 2007910), (20, 1003955), (25, 803164), (50, 401582), (100, 200791), (199, 100900), (398, 50450), (796, 25225), (995, 20180), (1009, 19900), (1990, 10090), (2018, 9950), (3980, 5045), (4036, 4975)]