1. The shoes of factorial apricot are size 24, which is the factorial of 4 \x0d\2. Perfect number: a perfect number, the sum of all its divisors is equal to itself. 28 is a perfect number, and 6 is the smallest perfect number. Perfect number is a precious number to express the connotation of perfection, a masterpiece of God, and perfect. \x0d\3。 Prime number: a prime number that has no divisor except 1 and itself. It is the loneliest number, natural and simple, independent and self-respecting, noble and unyielding. \x0d\4。 Imaginary number one: If you want to square-1, what will the result be? The doctor told us that it has an answer and is unique. It's a number called "I". In the film, the doctor said: I is an imaginary number, the square root of-1, a modest number, which has never appeared in the visible world, but only exists in the heart. Holding up a world with short arms represents love. \x0d\5。 Root number: When the doctor first met apricot's son, he praised him as a clever boy. Touching his flat head, I named him Gan. Doctors believe that the root sign, which means strong, protects every number. Because the root sign is compatible with every number, it is very tolerant of every number and can accommodate everyone and everything. \x0d\6。 Straight line: In reality, you will never see a straight line. The real straight line only exists in the heart, with no starting point and ending point and infinite extension. Eternal truth is invisible to the eyes, and it will not be influenced by matter, natural phenomena and feelings. \x0d\7。 Euler formula: The doctor has a formula for love: e (π * I)+ 1 = 0. Let all the complexity return to nothingness and peace.