21379956

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4421}}^1$

素因数の和:4472

約数の個数: 48

約数和(自身を含む): 55469568

約数和(自身を除く): 34089612

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 31, 39, 52, 62, 78, 93, 124, 156, 186, 372, 403, 806, 1209, 1612, 2418, 4421, 4836, 8842, 13263, 17684, 26526, 53052, 57473, 114946, 137051, 172419, 229892, 274102, 344838, 411153, 548204, 689676, 822306, 1644612, 1781663, 3563326, 5344989, 7126652, 10689978, 21379956]

約数ペア:

[(1, 21379956), (2, 10689978), (3, 7126652), (4, 5344989), (6, 3563326), (12, 1781663), (13, 1644612), (26, 822306), (31, 689676), (39, 548204), (52, 411153), (62, 344838), (78, 274102), (93, 229892), (124, 172419), (156, 137051), (186, 114946), (372, 57473), (403, 53052), (806, 26526), (1209, 17684), (1612, 13263), (2418, 8842), (4421, 4836)]