18939321

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{107}}^1\times {\mathrm{277}}^1$

素因数の和:461

約数の個数: 24

約数和(自身を含む): 28102464

約数和(自身を除く): 9163143

約数列:

[1, 3, 9, 71, 107, 213, 277, 321, 639, 831, 963, 2493, 7597, 19667, 22791, 29639, 59001, 68373, 88917, 177003, 266751, 2104369, 6313107, 18939321]

約数ペア:

[(1, 18939321), (3, 6313107), (9, 2104369), (71, 266751), (107, 177003), (213, 88917), (277, 68373), (321, 59001), (639, 29639), (831, 22791), (963, 19667), (2493, 7597)]