Google provide you the facility to transfer you apps to one account to another account, For transfer you google play apps you can follow the below steps : 

Transfer apps to a different developer account(you need to fill this form) :
https://support.google.com/googleplay/android-developer/contact/appt

Get Transaction ID form here :
https://wallet.google.com/manage/?referer=https://support.google.com/googleplay/android-developer/answer/6230247?hl%3Den#transactions:filter=ALL

Need More Details about transfer you google play apps? Please find this url:
https://support.google.com/googleplay/android-developer/answer/6230247?hl=en