20806072868

素因数分解:

$2^2\times 7^2\times {\mathrm{397}}^1\times {\mathrm{267389}}^1$

素因数の和:267804

約数の個数: 36

約数和(自身を含む): 42462066780

約数和(自身を除く): 21655993912

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 397, 794, 1588, 2779, 5558, 11116, 19453, 38906, 77812, 267389, 534778, 1069556, 1871723, 3743446, 7486892, 13102061, 26204122, 52408244, 106153433, 212306866, 424613732, 743074031, 1486148062, 2972296124, 5201518217, 10403036434, 20806072868]

約数ペア:

[(1, 20806072868), (2, 10403036434), (4, 5201518217), (7, 2972296124), (14, 1486148062), (28, 743074031), (49, 424613732), (98, 212306866), (196, 106153433), (397, 52408244), (794, 26204122), (1588, 13102061), (2779, 7486892), (5558, 3743446), (11116, 1871723), (19453, 1069556), (38906, 534778), (77812, 267389)]