20213425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{239}}^1$

素因数の和:465

約数の個数: 24

約数和(自身を含む): 26784000

約数和(自身を除く): 6570575

約数列:

[1, 5, 17, 25, 85, 199, 239, 425, 995, 1195, 3383, 4063, 4975, 5975, 16915, 20315, 47561, 84575, 101575, 237805, 808537, 1189025, 4042685, 20213425]

約数ペア:

[(1, 20213425), (5, 4042685), (17, 1189025), (25, 808537), (85, 237805), (199, 101575), (239, 84575), (425, 47561), (995, 20315), (1195, 16915), (3383, 5975), (4063, 4975)]