19988559

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{10427}}^1$

素因数の和:10507

約数の個数: 16

約数和(自身を含む): 30032640

約数和(自身を除く): 10044081

約数列:

[1, 3, 9, 27, 71, 213, 639, 1917, 10427, 31281, 93843, 281529, 740317, 2220951, 6662853, 19988559]

約数ペア:

[(1, 19988559), (3, 6662853), (9, 2220951), (27, 740317), (71, 281529), (213, 93843), (639, 31281), (1917, 10427)]