Cannot enchant mace using commands but you can with books.

Commands (Any level of enchantment and any player target does not work) - 

/enchant @s minecraft:fortune

/enchant @s minecraft:sharpness

/enchant @s minecraft:efficiency

/enchant @s minecraft:unbreaking

/enchant @s minecraft:mending

/enchant @s minecraft:fire_aspect

/enchant @s minecraft:bane_of_arthropods

/enchant @s minecraft:smite

/enchant @s minecraft:knockback

/enchant @s minecraft:silk_touch

/enchant @s minecraft:looting