19964375

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{1879}}^1$

素因数の和:1916

約数の個数: 20

約数和(自身を含む): 26429040

約数和(自身を除く): 6464665

約数列:

[1, 5, 17, 25, 85, 125, 425, 625, 1879, 2125, 9395, 10625, 31943, 46975, 159715, 234875, 798575, 1174375, 3992875, 19964375]

約数ペア:

[(1, 19964375), (5, 3992875), (17, 1174375), (25, 798575), (85, 234875), (125, 159715), (425, 46975), (625, 31943), (1879, 10625), (2125, 9395)]