30

30, abundant number

30 = 2 * 3 * 5 = 1² + 2² + 3² +4²

30⁵= 5⁵+10⁵+11⁵+16⁵+19⁵+29⁵

30 = 3 982 933 876 681³ − 636 600 549 515³ − 3 977 505 554 546³ .

2³⁰ - 1 = 3 * 3 * 7 * 11 * 31 * 151 * 331

10³⁰ - 1 = 3 * 3 * 3 * 7 * 11 * 13 * 31 * 37 * 41 * 211 * 241 * 271 * 2161 * 9091 * 2906161