19937421

素因数分解:

$3^6\times 7^1\times {\mathrm{3907}}^1$

素因数の和:3932

約数の個数: 28

約数和(自身を含む): 34171552

約数和(自身を除く): 14234131

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 3907, 5103, 11721, 27349, 35163, 82047, 105489, 246141, 316467, 738423, 949401, 2215269, 2848203, 6645807, 19937421]

約数ペア:

[(1, 19937421), (3, 6645807), (7, 2848203), (9, 2215269), (21, 949401), (27, 738423), (63, 316467), (81, 246141), (189, 105489), (243, 82047), (567, 35163), (729, 27349), (1701, 11721), (3907, 5103)]