21127239

素因数分解:

$3^2\times 7^1\times {\mathrm{491}}^1\times {\mathrm{683}}^1$

素因数の和:1187

約数の個数: 24

約数和(自身を含む): 34998912

約数和(自身を除く): 13871673

約数列:

[1, 3, 7, 9, 21, 63, 491, 683, 1473, 2049, 3437, 4419, 4781, 6147, 10311, 14343, 30933, 43029, 335353, 1006059, 2347471, 3018177, 7042413, 21127239]

約数ペア:

[(1, 21127239), (3, 7042413), (7, 3018177), (9, 2347471), (21, 1006059), (63, 335353), (491, 43029), (683, 30933), (1473, 14343), (2049, 10311), (3437, 6147), (4419, 4781)]