20521431

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2129}}^1$

素因数の和:2165

約数の個数: 40

約数和(自身を含む): 37113120

約数和(自身を除く): 16591689

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2129, 3213, 6387, 9639, 14903, 19161, 36193, 44709, 57483, 108579, 134127, 172449, 253351, 325737, 402381, 760053, 977211, 1207143, 2280159, 2931633, 6840477, 20521431]

約数ペア:

[(1, 20521431), (3, 6840477), (7, 2931633), (9, 2280159), (17, 1207143), (21, 977211), (27, 760053), (51, 402381), (63, 325737), (81, 253351), (119, 172449), (153, 134127), (189, 108579), (357, 57483), (459, 44709), (567, 36193), (1071, 19161), (1377, 14903), (2129, 9639), (3213, 6387)]