21678891

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{11827}}^1$

素因数の和:11890

約数の個数: 16

約数和(自身を含む): 31793664

約数和(自身を除く): 10114773

約数列:

[1, 3, 13, 39, 47, 141, 611, 1833, 11827, 35481, 153751, 461253, 555869, 1667607, 7226297, 21678891]

約数ペア:

[(1, 21678891), (3, 7226297), (13, 1667607), (39, 555869), (47, 461253), (141, 153751), (611, 35481), (1833, 11827)]