28680813

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{3323}}^1$

素因数の和:3473

約数の個数: 24

約数和(自身を含む): 47706048

約数和(自身を除く): 19025235

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2877, 3323, 8631, 9969, 23261, 29907, 69783, 209349, 455251, 1365753, 3186757, 4097259, 9560271, 28680813]

約数ペア:

[(1, 28680813), (3, 9560271), (7, 4097259), (9, 3186757), (21, 1365753), (63, 455251), (137, 209349), (411, 69783), (959, 29907), (1233, 23261), (2877, 9969), (3323, 8631)]