21427978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{74923}}^1$

素因数の和:74949

約数の個数: 16

約数和(自身を含む): 37761696

約数和(自身を除く): 16333718

約数列:

[1, 2, 11, 13, 22, 26, 143, 286, 74923, 149846, 824153, 973999, 1648306, 1947998, 10713989, 21427978]

約数ペア:

[(1, 21427978), (2, 10713989), (11, 1947998), (13, 1648306), (22, 973999), (26, 824153), (143, 149846), (286, 74923)]