3987999

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{79}}^2$

素因数の和:235

約数の個数: 18

約数和(自身を含む): 5916456

約数和(自身を除く): 1928457

約数列:

[1, 3, 9, 71, 79, 213, 237, 639, 711, 5609, 6241, 16827, 18723, 50481, 56169, 443111, 1329333, 3987999]

約数ペア:

[(1, 3987999), (3, 1329333), (9, 443111), (71, 56169), (79, 50481), (213, 18723), (237, 16827), (639, 6241), (711, 5609)]