1991871

素因数分解:

$3^5\times 7^1\times {\mathrm{1171}}^1$

素因数の和:1193

約数の個数: 24

約数和(自身を含む): 3412864

約数和(自身を除く): 1420993

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1171, 1701, 3513, 8197, 10539, 24591, 31617, 73773, 94851, 221319, 284553, 663957, 1991871]

約数ペア:

[(1, 1991871), (3, 663957), (7, 284553), (9, 221319), (21, 94851), (27, 73773), (63, 31617), (81, 24591), (189, 10539), (243, 8197), (567, 3513), (1171, 1701)]