21028231

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{709}}^1$

素因数の和:958

約数の個数: 16

約数和(自身を含む): 25446400

約数和(自身を除く): 4418169

約数列:

[1, 7, 19, 133, 223, 709, 1561, 4237, 4963, 13471, 29659, 94297, 158107, 1106749, 3004033, 21028231]

約数ペア:

[(1, 21028231), (7, 3004033), (19, 1106749), (133, 158107), (223, 94297), (709, 29659), (1561, 13471), (4237, 4963)]