720981

素因数分解:

$3^6\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:84

約数の個数: 28

約数和(自身を含む): 1154208

約数和(自身を除く): 433227

約数列:

[1, 3, 9, 23, 27, 43, 69, 81, 129, 207, 243, 387, 621, 729, 989, 1161, 1863, 2967, 3483, 5589, 8901, 10449, 16767, 26703, 31347, 80109, 240327, 720981]

約数ペア:

[(1, 720981), (3, 240327), (9, 80109), (23, 31347), (27, 26703), (43, 16767), (69, 10449), (81, 8901), (129, 5589), (207, 3483), (243, 2967), (387, 1863), (621, 1161), (729, 989)]