690759

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:147

約数の個数: 24

約数和(自身を含む): 1078272

約数和(自身を除く): 387513

約数列:

[1, 3, 9, 23, 47, 69, 71, 141, 207, 213, 423, 639, 1081, 1633, 3243, 3337, 4899, 9729, 10011, 14697, 30033, 76751, 230253, 690759]

約数ペア:

[(1, 690759), (3, 230253), (9, 76751), (23, 30033), (47, 14697), (69, 10011), (71, 9729), (141, 4899), (207, 3337), (213, 3243), (423, 1633), (639, 1081)]