21940009

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{683}}^1$

素因数の和:1056

約数の個数: 16

約数和(自身を含む): 27119232

約数和(自身を除く): 5179223

約数列:

[1, 7, 13, 91, 353, 683, 2471, 4589, 4781, 8879, 32123, 62153, 241099, 1687693, 3134287, 21940009]

約数ペア:

[(1, 21940009), (7, 3134287), (13, 1687693), (91, 241099), (353, 62153), (683, 32123), (2471, 8879), (4589, 4781)]