21062187

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{3881}}^1$

素因数の和:3960

約数の個数: 20

約数和(自身を含む): 31941096

約数和(自身を除く): 10878909

約数列:

[1, 3, 9, 27, 67, 81, 201, 603, 1809, 3881, 5427, 11643, 34929, 104787, 260027, 314361, 780081, 2340243, 7020729, 21062187]

約数ペア:

[(1, 21062187), (3, 7020729), (9, 2340243), (27, 780081), (67, 314361), (81, 260027), (201, 104787), (603, 34929), (1809, 11643), (3881, 5427)]