19979421

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{86491}}^1$

素因数の和:86512

約数の個数: 16

約数和(自身を含む): 33212928

約数和(自身を除く): 13233507

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 86491, 259473, 605437, 951401, 1816311, 2854203, 6659807, 19979421]

約数ペア:

[(1, 19979421), (3, 6659807), (7, 2854203), (11, 1816311), (21, 951401), (33, 605437), (77, 259473), (231, 86491)]