21211239

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53161}}^1$

素因数の和:53190

約数の個数: 16

約数和(自身を含む): 34023680

約数和(自身を除く): 12812441

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53161, 159483, 372127, 1010059, 1116381, 3030177, 7070413, 21211239]

約数ペア:

[(1, 21211239), (3, 7070413), (7, 3030177), (19, 1116381), (21, 1010059), (57, 372127), (133, 159483), (399, 53161)]