18991397

素因数分解:

${\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{277}}^1$

素因数の和:440

約数の個数: 16

約数和(自身を含む): 20916720

約数和(自身を除く): 1925323

約数列:

[1, 17, 37, 109, 277, 629, 1853, 4033, 4709, 10249, 30193, 68561, 174233, 513281, 1117141, 18991397]

約数ペア:

[(1, 18991397), (17, 1117141), (37, 513281), (109, 174233), (277, 68561), (629, 30193), (1853, 10249), (4033, 4709)]