21091563

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{223}}^1$

素因数の和:376

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 11594517

約数列:

[1, 3, 9, 27, 31, 93, 113, 223, 279, 339, 669, 837, 1017, 2007, 3051, 3503, 6021, 6913, 10509, 20739, 25199, 31527, 62217, 75597, 94581, 186651, 226791, 680373, 781169, 2343507, 7030521, 21091563]

約数ペア:

[(1, 21091563), (3, 7030521), (9, 2343507), (27, 781169), (31, 680373), (93, 226791), (113, 186651), (223, 94581), (279, 75597), (339, 62217), (669, 31527), (837, 25199), (1017, 20739), (2007, 10509), (3051, 6913), (3503, 6021)]