21290247

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{2591}}^1$

素因数の和:2691

約数の個数: 24

約数和(自身を含む): 33965568

約数和(自身を除く): 12675321

約数列:

[1, 3, 9, 11, 33, 83, 99, 249, 747, 913, 2591, 2739, 7773, 8217, 23319, 28501, 85503, 215053, 256509, 645159, 1935477, 2365583, 7096749, 21290247]

約数ペア:

[(1, 21290247), (3, 7096749), (9, 2365583), (11, 1935477), (33, 645159), (83, 256509), (99, 215053), (249, 85503), (747, 28501), (913, 23319), (2591, 8217), (2739, 7773)]