18278721

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{227}}^1\times {\mathrm{389}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 27743040

約数和(自身を除く): 9464319

約数列:

[1, 3, 9, 23, 69, 207, 227, 389, 681, 1167, 2043, 3501, 5221, 8947, 15663, 26841, 46989, 80523, 88303, 264909, 794727, 2030969, 6092907, 18278721]

約数ペア:

[(1, 18278721), (3, 6092907), (9, 2030969), (23, 794727), (69, 264909), (207, 88303), (227, 80523), (389, 46989), (681, 26841), (1167, 15663), (2043, 8947), (3501, 5221)]