19865139

素因数分解:

$3^1\times 7^2\times {\mathrm{337}}^1\times {\mathrm{401}}^1$

素因数の和:755

約数の個数: 24

約数和(自身を含む): 30979728

約数和(自身を除く): 11114589

約数列:

[1, 3, 7, 21, 49, 147, 337, 401, 1011, 1203, 2359, 2807, 7077, 8421, 16513, 19649, 49539, 58947, 135137, 405411, 945959, 2837877, 6621713, 19865139]

約数ペア:

[(1, 19865139), (3, 6621713), (7, 2837877), (21, 945959), (49, 405411), (147, 135137), (337, 58947), (401, 49539), (1011, 19649), (1203, 16513), (2359, 8421), (2807, 7077)]