Myuran Sukumaran and Andrew Chan are spending some of their final hours with family as the clock ticks down to their executions.

The Bali Nine pair were told on Saturday they would be executed on Tuesday, a moment preserved by Sukumaran who signed one of three self-portraits "72 hours just started".

His mother, Raji, and siblings, Brintha and Chunthu, were among those to visit him on Sunday, making the sad journey with Chan's mother, Helen, brother, Michael, and fiancee Feby, among other friends.

It's unclear how many of the 10 prisoners Indonesia has readied for execution will face the firing squad, with reports Frenchman Serge Atlaoui has been granted a reprieve.

Sukumaran and Chan were also asked on Saturday for their last wishes, and have been granted more time with family in their final days.

Lawyers are pleading with Jakarta to respect legal proceedings that several are still pursuing, while international pressure for mercy also grows.

France has pledged to work with Australia to halt the executions, with Prime Minister Tony Abbott set to meet Francois Hollande on Monday. Foreign Minister Julie Bishop has been seeking talks with her a Indonesian counterpart since Friday.

Chan and Sukumaran's lawyers have lodged a challenge with the constitutional court but the Attorney-General doesn't acknowledge it, arguing the pair have exhausted their appeals.

But his office is yet to respond to moves by lawyers for Filipina Mary Jane Veloso, who filed a second request for a judicial review late on Friday.

Indonesian Zainal Abidin has an appeal before the courts due to be decided on Monday but has been moved in preparation for execution, as if the result was pre-determined.

Atlaoui apparently won a reprieve based on an administrative matter.

UN Secretary General Ban Ki-Moon has added his voice to global calls for Indonesia to halt its execution plans.

"The Secretary General urges President Joko Widodo to urgently consider declaring a moratorium on capital punishment in Indonesia, with a view toward abolition," a spokesman for Mr Ban said. AAP