20400425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2087}}^1$

素因数の和:2137

約数の個数: 24

約数和(自身を含む): 27962496

約数和(自身を除く): 7562071

約数列:

[1, 5, 17, 23, 25, 85, 115, 391, 425, 575, 1955, 2087, 9775, 10435, 35479, 48001, 52175, 177395, 240005, 816017, 886975, 1200025, 4080085, 20400425]

約数ペア:

[(1, 20400425), (5, 4080085), (17, 1200025), (23, 886975), (25, 816017), (85, 240005), (115, 177395), (391, 52175), (425, 48001), (575, 35479), (1955, 10435), (2087, 9775)]