20289789

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{101}}^2$

素因数の和:238

約数の個数: 36

約数和(自身を含む): 33752628

約数和(自身を除く): 13462839

約数列:

[1, 3, 9, 13, 17, 39, 51, 101, 117, 153, 221, 303, 663, 909, 1313, 1717, 1989, 3939, 5151, 10201, 11817, 15453, 22321, 30603, 66963, 91809, 132613, 173417, 200889, 397839, 520251, 1193517, 1560753, 2254421, 6763263, 20289789]

約数ペア:

[(1, 20289789), (3, 6763263), (9, 2254421), (13, 1560753), (17, 1193517), (39, 520251), (51, 397839), (101, 200889), (117, 173417), (153, 132613), (221, 91809), (303, 66963), (663, 30603), (909, 22321), (1313, 15453), (1717, 11817), (1989, 10201), (3939, 5151)]