19854261

素因数分解:

$3^3\times 7^2\times {\mathrm{43}}^1\times {\mathrm{349}}^1$

素因数の和:415

約数の個数: 48

約数和(自身を含む): 35112000

約数和(自身を除く): 15257739

約数列:

[1, 3, 7, 9, 21, 27, 43, 49, 63, 129, 147, 189, 301, 349, 387, 441, 903, 1047, 1161, 1323, 2107, 2443, 2709, 3141, 6321, 7329, 8127, 9423, 15007, 17101, 18963, 21987, 45021, 51303, 56889, 65961, 105049, 135063, 153909, 315147, 405189, 461727, 735343, 945441, 2206029, 2836323, 6618087, 19854261]

約数ペア:

[(1, 19854261), (3, 6618087), (7, 2836323), (9, 2206029), (21, 945441), (27, 735343), (43, 461727), (49, 405189), (63, 315147), (129, 153909), (147, 135063), (189, 105049), (301, 65961), (349, 56889), (387, 51303), (441, 45021), (903, 21987), (1047, 18963), (1161, 17101), (1323, 15007), (2107, 9423), (2443, 8127), (2709, 7329), (3141, 6321)]