20818509

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{409}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 29992320

約数和(自身を除く): 9173811

約数列:

[1, 3, 19, 47, 57, 141, 361, 409, 893, 1083, 1227, 2679, 7771, 16967, 19223, 23313, 50901, 57669, 147649, 365237, 442947, 1095711, 6939503, 20818509]

約数ペア:

[(1, 20818509), (3, 6939503), (19, 1095711), (47, 442947), (57, 365237), (141, 147649), (361, 57669), (409, 50901), (893, 23313), (1083, 19223), (1227, 16967), (2679, 7771)]