21456125

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{439}}^1$

素因数の和:494

約数の個数: 32

約数和(自身を含む): 29652480

約数和(自身を除く): 8196355

約数列:

[1, 5, 17, 23, 25, 85, 115, 125, 391, 425, 439, 575, 1955, 2125, 2195, 2875, 7463, 9775, 10097, 10975, 37315, 48875, 50485, 54875, 171649, 186575, 252425, 858245, 932875, 1262125, 4291225, 21456125]

約数ペア:

[(1, 21456125), (5, 4291225), (17, 1262125), (23, 932875), (25, 858245), (85, 252425), (115, 186575), (125, 171649), (391, 54875), (425, 50485), (439, 48875), (575, 37315), (1955, 10975), (2125, 10097), (2195, 9775), (2875, 7463)]