19819775

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:335

約数の個数: 24

約数和(自身を含む): 25534080

約数和(自身を除く): 5714305

約数列:

[1, 5, 25, 43, 103, 179, 215, 515, 895, 1075, 2575, 4429, 4475, 7697, 18437, 22145, 38485, 92185, 110725, 192425, 460925, 792791, 3963955, 19819775]

約数ペア:

[(1, 19819775), (5, 3963955), (25, 792791), (43, 460925), (103, 192425), (179, 110725), (215, 92185), (515, 38485), (895, 22145), (1075, 18437), (2575, 7697), (4429, 4475)]