21371217

素因数分解:

$3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{9511}}^1$

素因数の和:9628

約数の個数: 16

約数和(自身を含む): 32873472

約数和(自身を除く): 11502255

約数列:

[1, 3, 7, 21, 107, 321, 749, 2247, 9511, 28533, 66577, 199731, 1017677, 3053031, 7123739, 21371217]

約数ペア:

[(1, 21371217), (3, 7123739), (7, 3053031), (21, 1017677), (107, 199731), (321, 66577), (749, 28533), (2247, 9511)]