21487557

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2539}}^1$

素因数の和:2593

約数の個数: 32

約数和(自身を含む): 36413440

約数和(自身を除く): 14925883

約数列:

[1, 3, 7, 13, 21, 31, 39, 91, 93, 217, 273, 403, 651, 1209, 2539, 2821, 7617, 8463, 17773, 33007, 53319, 78709, 99021, 231049, 236127, 550963, 693147, 1023217, 1652889, 3069651, 7162519, 21487557]

約数ペア:

[(1, 21487557), (3, 7162519), (7, 3069651), (13, 1652889), (21, 1023217), (31, 693147), (39, 550963), (91, 236127), (93, 231049), (217, 99021), (273, 78709), (403, 53319), (651, 33007), (1209, 17773), (2539, 8463), (2821, 7617)]