21019401

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 34909056

約数和(自身を除く): 13889655

約数列:

[1, 3, 9, 13, 23, 39, 69, 73, 107, 117, 207, 219, 299, 321, 657, 897, 949, 963, 1391, 1679, 2461, 2691, 2847, 4173, 5037, 7383, 7811, 8541, 12519, 15111, 21827, 22149, 23433, 31993, 65481, 70299, 95979, 101543, 179653, 196443, 287937, 304629, 538959, 913887, 1616877, 2335489, 7006467, 21019401]

約数ペア:

[(1, 21019401), (3, 7006467), (9, 2335489), (13, 1616877), (23, 913887), (39, 538959), (69, 304629), (73, 287937), (107, 196443), (117, 179653), (207, 101543), (219, 95979), (299, 70299), (321, 65481), (657, 31993), (897, 23433), (949, 22149), (963, 21827), (1391, 15111), (1679, 12519), (2461, 8541), (2691, 7811), (2847, 7383), (4173, 5037)]