21290697

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{6553}}^1$

素因数の和:6597

約数の個数: 18

約数和(自身を含む): 32461962

約数和(自身を除く): 11171265

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 6553, 19659, 58977, 124507, 373521, 1120563, 2365633, 7096899, 21290697]

約数ペア:

[(1, 21290697), (3, 7096899), (9, 2365633), (19, 1120563), (57, 373521), (171, 124507), (361, 58977), (1083, 19659), (3249, 6553)]