19701279

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{41}}^1$

素因数の和:137

約数の個数: 48

約数和(自身を含む): 33092640

約数和(自身を除く): 13391361

約数列:

[1, 3, 9, 13, 27, 37, 39, 41, 111, 117, 123, 333, 351, 369, 481, 533, 999, 1107, 1369, 1443, 1517, 1599, 4107, 4329, 4551, 4797, 12321, 12987, 13653, 14391, 17797, 19721, 36963, 40959, 53391, 56129, 59163, 160173, 168387, 177489, 480519, 505161, 532467, 729677, 1515483, 2189031, 6567093, 19701279]

約数ペア:

[(1, 19701279), (3, 6567093), (9, 2189031), (13, 1515483), (27, 729677), (37, 532467), (39, 505161), (41, 480519), (111, 177489), (117, 168387), (123, 160173), (333, 59163), (351, 56129), (369, 53391), (481, 40959), (533, 36963), (999, 19721), (1107, 17797), (1369, 14391), (1443, 13653), (1517, 12987), (1599, 12321), (4107, 4797), (4329, 4551)]