18801321

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:629

約数の個数: 32

約数和(自身を含む): 31488000

約数和(自身を除く): 12686679

約数列:

[1, 3, 7, 11, 21, 33, 77, 199, 231, 409, 597, 1227, 1393, 2189, 2863, 4179, 4499, 6567, 8589, 13497, 15323, 31493, 45969, 81391, 94479, 244173, 569737, 895301, 1709211, 2685903, 6267107, 18801321]

約数ペア:

[(1, 18801321), (3, 6267107), (7, 2685903), (11, 1709211), (21, 895301), (33, 569737), (77, 244173), (199, 94479), (231, 81391), (409, 45969), (597, 31493), (1227, 15323), (1393, 13497), (2189, 8589), (2863, 6567), (4179, 4499)]