20156121

素因数分解:

$3^6\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:704

約数の個数: 28

約数和(自身を含む): 30971248

約数和(自身を除く): 10815127

約数列:

[1, 3, 9, 27, 43, 81, 129, 243, 387, 643, 729, 1161, 1929, 3483, 5787, 10449, 17361, 27649, 31347, 52083, 82947, 156249, 248841, 468747, 746523, 2239569, 6718707, 20156121]

約数ペア:

[(1, 20156121), (3, 6718707), (9, 2239569), (27, 746523), (43, 468747), (81, 248841), (129, 156249), (243, 82947), (387, 52083), (643, 31347), (729, 27649), (1161, 17361), (1929, 10449), (3483, 5787)]