28188279

素因数分解:

$3^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{1559}}^1$

素因数の和:1620

約数の個数: 36

約数和(自身を含む): 48550320

約数和(自身を除く): 20362041

約数列:

[1, 3, 7, 9, 21, 41, 49, 63, 123, 147, 287, 369, 441, 861, 1559, 2009, 2583, 4677, 6027, 10913, 14031, 18081, 32739, 63919, 76391, 98217, 191757, 229173, 447433, 575271, 687519, 1342299, 3132031, 4026897, 9396093, 28188279]

約数ペア:

[(1, 28188279), (3, 9396093), (7, 4026897), (9, 3132031), (21, 1342299), (41, 687519), (49, 575271), (63, 447433), (123, 229173), (147, 191757), (287, 98217), (369, 76391), (441, 63919), (861, 32739), (1559, 18081), (2009, 14031), (2583, 10913), (4677, 6027)]