20396691

素因数分解:

$3^6\times 7^2\times {\mathrm{571}}^1$

素因数の和:603

約数の個数: 42

約数和(自身を含む): 35636172

約数和(自身を除く): 15239481

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 441, 567, 571, 729, 1323, 1701, 1713, 3969, 3997, 5103, 5139, 11907, 11991, 15417, 27979, 35721, 35973, 46251, 83937, 107919, 138753, 251811, 323757, 416259, 755433, 971271, 2266299, 2913813, 6798897, 20396691]

約数ペア:

[(1, 20396691), (3, 6798897), (7, 2913813), (9, 2266299), (21, 971271), (27, 755433), (49, 416259), (63, 323757), (81, 251811), (147, 138753), (189, 107919), (243, 83937), (441, 46251), (567, 35973), (571, 35721), (729, 27979), (1323, 15417), (1701, 11991), (1713, 11907), (3969, 5139), (3997, 5103)]