21215205

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42859}}^1$

素因数の和:42881

約数の個数: 24

約数和(自身を含む): 40116960

約数和(自身を除く): 18901755

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42859, 128577, 214295, 385731, 471449, 642885, 1414347, 1928655, 2357245, 4243041, 7071735, 21215205]

約数ペア:

[(1, 21215205), (3, 7071735), (5, 4243041), (9, 2357245), (11, 1928655), (15, 1414347), (33, 642885), (45, 471449), (55, 385731), (99, 214295), (165, 128577), (495, 42859)]