28172781

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{839}}^1$

素因数の和:906

約数の個数: 48

約数和(自身を含む): 51367680

約数和(自身を除く): 23194899

約数列:

[1, 3, 7, 9, 13, 21, 39, 41, 63, 91, 117, 123, 273, 287, 369, 533, 819, 839, 861, 1599, 2517, 2583, 3731, 4797, 5873, 7551, 10907, 11193, 17619, 32721, 33579, 34399, 52857, 76349, 98163, 103197, 229047, 240793, 309591, 447187, 687141, 722379, 1341561, 2167137, 3130309, 4024683, 9390927, 28172781]

約数ペア:

[(1, 28172781), (3, 9390927), (7, 4024683), (9, 3130309), (13, 2167137), (21, 1341561), (39, 722379), (41, 687141), (63, 447187), (91, 309591), (117, 240793), (123, 229047), (273, 103197), (287, 98163), (369, 76349), (533, 52857), (819, 34399), (839, 33579), (861, 32721), (1599, 17619), (2517, 11193), (2583, 10907), (3731, 7551), (4797, 5873)]