21001239

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19609}}^1$

素因数の和:19639

約数の個数: 24

約数和(自身を含む): 36709920

約数和(自身を除く): 15708681

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 19609, 58827, 137263, 176481, 333353, 411789, 1000059, 1235367, 2333471, 3000177, 7000413, 21001239]

約数ペア:

[(1, 21001239), (3, 7000413), (7, 3000177), (9, 2333471), (17, 1235367), (21, 1000059), (51, 411789), (63, 333353), (119, 176481), (153, 137263), (357, 58827), (1071, 19609)]