21162561

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7577}}^1$

素因数の和:7613

約数の個数: 24

約数和(自身を含む): 34555680

約数和(自身を除く): 13393119

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7577, 22731, 53039, 143963, 159117, 371273, 431889, 1007741, 1113819, 3023223, 7054187, 21162561]

約数ペア:

[(1, 21162561), (3, 7054187), (7, 3023223), (19, 1113819), (21, 1007741), (49, 431889), (57, 371273), (133, 159117), (147, 143963), (399, 53039), (931, 22731), (2793, 7577)]