18640713

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{68281}}^1$

素因数の和:68304

約数の個数: 16

約数和(自身を含む): 30590336

約数和(自身を除く): 11949623

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 68281, 204843, 477967, 887653, 1433901, 2662959, 6213571, 18640713]

約数ペア:

[(1, 18640713), (3, 6213571), (7, 2662959), (13, 1433901), (21, 887653), (39, 477967), (91, 204843), (273, 68281)]