81631389

素因数分解:

$3^1\times 7^1\times {\mathrm{1531}}^1\times {\mathrm{2539}}^1$

素因数の和:4080

約数の個数: 16

約数和(自身を含む): 124520960

約数和(自身を除く): 42889571

約数列:

[1, 3, 7, 21, 1531, 2539, 4593, 7617, 10717, 17773, 32151, 53319, 3887209, 11661627, 27210463, 81631389]

約数ペア:

[(1, 81631389), (3, 27210463), (7, 11661627), (21, 3887209), (1531, 53319), (2539, 32151), (4593, 17773), (7617, 10717)]