Short answer. No, not alone. Article 1612 of the Civil Code limits each of several joint sellers of an undivided immovable with right of repurchase to redeeming only his own respective share, not the whole property. The same limit applies to the heirs of a sole seller, each of whom may redeem only the part he acquired.
What the law says
If several persons, jointly and in the same contract, should sell an undivided immovable with a right of repurchase, none of them may exercise this right for more than his respective share.
Civil Code, Article 1612 — Joint Sellers' Redemption Limited to Their Share. Read the full provision →
Why your redemption right is limited to your share
Article 1612 addresses exactly your situation: several persons, jointly and in the same contract, sell an undivided immovable with a right of repurchase. In that setting, the article says none of them may exercise this right for more than his respective share. Even though you and your co-sellers sold the property together as one transaction, the right to redeem it afterward is not treated as a single, joint right that any one of you can exercise over the whole; it is divided according to each seller's own share.
What this means if you want to redeem alone
Because your redemption right is capped at your own respective share, acting alone lets you redeem only the portion of the property corresponding to your share in the original sale, not the entire immovable. If you want the whole property back, you generally need your co-sellers to also exercise their own redemption rights over their respective shares, since Article 1612 does not let one seller unilaterally redeem shares that belonged to the others.
The parallel rule for heirs of a sole seller
Article 1612 extends the same logic to a different scenario: the same rule applies if the person who sold an immovable alone has left several heirs, in which case each of the latter may only redeem the part which he may have acquired. This means that even where there was originally just one seller, if that seller has since died and left several heirs, those heirs inherit the redemption right divided according to what each of them acquired, rather than any single heir being able to redeem the whole property alone.
Why the law splits the right this way
This approach keeps the redemption right proportionate to the interest each person actually held in the original sale, whether as a joint seller or as an heir who inherited a portion of that right. It prevents one joint seller, or one heir, from unilaterally controlling the fate of the whole property by redeeming shares that were never theirs to begin with, while still allowing each person to protect and recover the specific share that was genuinely their own to redeem.