Problem 446: Retractions B
For every integer n>1, the family of functions fn,a,b is defined
by fn,a,b(x)≡ax+b mod n for a,b,x integer and 0
F(N)=∑R(n4+4) for 1≤n≤N. F(1024)=77532377300600.
Find F(107) (mod 1 000 000 007)
Test
{{test}}Console output
For every integer n>1, the family of functions fn,a,b is defined
by fn,a,b(x)≡ax+b mod n for a,b,x integer and 0
F(N)=∑R(n4+4) for 1≤n≤N. F(1024)=77532377300600.
Find F(107) (mod 1 000 000 007)
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