20253807

素因数分解:

$3^{10}\times 7^3$

素因数の和:51

約数の個数: 44

約数和(自身を含む): 35429200

約数和(自身を除く): 15175393

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 343, 441, 567, 729, 1029, 1323, 1701, 2187, 3087, 3969, 5103, 6561, 9261, 11907, 15309, 19683, 27783, 35721, 45927, 59049, 83349, 107163, 137781, 250047, 321489, 413343, 750141, 964467, 2250423, 2893401, 6751269, 20253807]

約数ペア:

[(1, 20253807), (3, 6751269), (7, 2893401), (9, 2250423), (21, 964467), (27, 750141), (49, 413343), (63, 321489), (81, 250047), (147, 137781), (189, 107163), (243, 83349), (343, 59049), (441, 45927), (567, 35721), (729, 27783), (1029, 19683), (1323, 15309), (1701, 11907), (2187, 9261), (3087, 6561), (3969, 5103)]