20013021

素因数分解:

$3^3\times 7^3\times {\mathrm{2161}}^1$

素因数の和:2191

約数の個数: 32

約数和(自身を含む): 34592000

約数和(自身を除く): 14578979

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 343, 441, 1029, 1323, 2161, 3087, 6483, 9261, 15127, 19449, 45381, 58347, 105889, 136143, 317667, 408429, 741223, 953001, 2223669, 2859003, 6671007, 20013021]

約数ペア:

[(1, 20013021), (3, 6671007), (7, 2859003), (9, 2223669), (21, 953001), (27, 741223), (49, 408429), (63, 317667), (147, 136143), (189, 105889), (343, 58347), (441, 45381), (1029, 19449), (1323, 15127), (2161, 9261), (3087, 6483)]