19857789

素因数分解:

$3^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{1217}}^1$

素因数の和:1274

約数の個数: 36

約数和(自身を含む): 34296444

約数和(自身を除く): 14438655

約数列:

[1, 3, 7, 9, 21, 37, 49, 63, 111, 147, 259, 333, 441, 777, 1217, 1813, 2331, 3651, 5439, 8519, 10953, 16317, 25557, 45029, 59633, 76671, 135087, 178899, 315203, 405261, 536697, 945609, 2206421, 2836827, 6619263, 19857789]

約数ペア:

[(1, 19857789), (3, 6619263), (7, 2836827), (9, 2206421), (21, 945609), (37, 536697), (49, 405261), (63, 315203), (111, 178899), (147, 135087), (259, 76671), (333, 59633), (441, 45029), (777, 25557), (1217, 16317), (1813, 10953), (2331, 8519), (3651, 5439)]