21070021

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{3001}}^1$

素因数の和:3084

約数の個数: 16

約数和(自身を含む): 25937280

約数和(自身を除く): 4867259

約数列:

[1, 7, 17, 59, 119, 413, 1003, 3001, 7021, 21007, 51017, 177059, 357119, 1239413, 3010003, 21070021]

約数ペア:

[(1, 21070021), (7, 3010003), (17, 1239413), (59, 357119), (119, 177059), (413, 51017), (1003, 21007), (3001, 7021)]