17995887

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:149

約数の個数: 72

約数和(自身を含む): 33777744

約数和(自身を除く): 15781857

約数列:

[1, 3, 7, 9, 13, 21, 39, 43, 49, 63, 73, 91, 117, 129, 147, 219, 273, 301, 387, 441, 511, 559, 637, 657, 819, 903, 949, 1533, 1677, 1911, 2107, 2709, 2847, 3139, 3577, 3913, 4599, 5031, 5733, 6321, 6643, 8541, 9417, 10731, 11739, 18963, 19929, 21973, 27391, 28251, 32193, 35217, 40807, 46501, 59787, 65919, 82173, 122421, 139503, 153811, 197757, 246519, 285649, 367263, 418509, 461433, 856947, 1384299, 1999543, 2570841, 5998629, 17995887]

約数ペア:

[(1, 17995887), (3, 5998629), (7, 2570841), (9, 1999543), (13, 1384299), (21, 856947), (39, 461433), (43, 418509), (49, 367263), (63, 285649), (73, 246519), (91, 197757), (117, 153811), (129, 139503), (147, 122421), (219, 82173), (273, 65919), (301, 59787), (387, 46501), (441, 40807), (511, 35217), (559, 32193), (637, 28251), (657, 27391), (819, 21973), (903, 19929), (949, 18963), (1533, 11739), (1677, 10731), (1911, 9417), (2107, 8541), (2709, 6643), (2847, 6321), (3139, 5733), (3577, 5031), (3913, 4599)]