20991729

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{3229}}^1$

素因数の和:3440

約数の個数: 16

約数和(自身を含む): 30697920

約数和(自身を除く): 9706191

約数列:

[1, 3, 11, 33, 197, 591, 2167, 3229, 6501, 9687, 35519, 106557, 636113, 1908339, 6997243, 20991729]

約数ペア:

[(1, 20991729), (3, 6997243), (11, 1908339), (33, 636113), (197, 106557), (591, 35519), (2167, 9687), (3229, 6501)]