Twins Alon Alexander and Oren Alexander, 39, and Tal Alexander, 40, were sentenced by US District Judge Valerie Caproni in Manhattan, seven months after being convicted in a six-week trial of multiple sex crimes including conspiracy to commit sex trafficking.
Lawyers for the brothers did not immediately respond to requests for comment.
Caproni called the brothers' conduct "monstrous."
The judge equated the siblings to Dr Jekyll and M. Hyde as she reconciled their March sex trafficking conviction with their claims that being fathers and husbands had changed them from the partying, womanising ways of their youth.
"It's hard for me to believe the defendants changed their spots just like that," Caproni said.
She added, "it strains credulity that marriage would change them from sexual predators to model gentlemen."
Oren and Tal Alexander were co-founders of the luxury real estate brokerage Official, while Alon Alexander was an executive at his family's security company Kent Security.
Prosecutors sought life sentences, while the Alexanders requested mandatory minimum 15-year prison terms.
Prosecutors said the brothers for at least 14 years exploited their social status to prey on women and girls, with more than 70 women saying they were assaulted by one or more of the brothers in locations including Manhattan, the Hamptons on New York's Long Island, and Aspen, Colorado.
In one instance, prosecutors said in January 2017 three girls were celebrating their senior year in high school at an Aspen nightclub when the brothers drugged them, enticed them to their five-star hotel for a promised after party, and then assaulted them.
New York City Police Commissioner Jessica Tisch said in a statement provided by the US Attorney's office in Manhattan, which prosecuted the Alexanders: "With today's sentencing, they will finally face the consequences they deserve for the incredible harm they inflicted on so many."
with AP
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