20403981

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{2153}}^1$

素因数の和:2184

約数の個数: 28

約数和(自身を含む): 32960508

約数和(自身を除く): 12556527

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 729, 1053, 2153, 3159, 6459, 9477, 19377, 27989, 58131, 83967, 174393, 251901, 523179, 755703, 1569537, 2267109, 6801327, 20403981]

約数ペア:

[(1, 20403981), (3, 6801327), (9, 2267109), (13, 1569537), (27, 755703), (39, 523179), (81, 251901), (117, 174393), (243, 83967), (351, 58131), (729, 27989), (1053, 19377), (2153, 9477), (3159, 6459)]