21009747

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{17207}}^1$

素因数の和:17258

約数の個数: 16

約数和(自身を含む): 31387392

約数和(自身を除く): 10377645

約数列:

[1, 3, 11, 33, 37, 111, 407, 1221, 17207, 51621, 189277, 567831, 636659, 1909977, 7003249, 21009747]

約数ペア:

[(1, 21009747), (3, 7003249), (11, 1909977), (33, 636659), (37, 567831), (111, 189277), (407, 51621), (1221, 17207)]