21091779

素因数分解:

$3^3\times {\mathrm{127}}^1\times {\mathrm{6151}}^1$

素因数の和:6287

約数の個数: 16

約数和(自身を含む): 31498240

約数和(自身を除く): 10406461

約数列:

[1, 3, 9, 27, 127, 381, 1143, 3429, 6151, 18453, 55359, 166077, 781177, 2343531, 7030593, 21091779]

約数ペア:

[(1, 21091779), (3, 7030593), (9, 2343531), (27, 781177), (127, 166077), (381, 55359), (1143, 18453), (3429, 6151)]