21208503

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{509}}^1$

素因数の和:591

約数の個数: 32

約数和(自身を含む): 32313600

約数和(自身を除く): 11105097

約数列:

[1, 3, 17, 19, 43, 51, 57, 129, 323, 509, 731, 817, 969, 1527, 2193, 2451, 8653, 9671, 13889, 21887, 25959, 29013, 41667, 65661, 164407, 372079, 415853, 493221, 1116237, 1247559, 7069501, 21208503]

約数ペア:

[(1, 21208503), (3, 7069501), (17, 1247559), (19, 1116237), (43, 493221), (51, 415853), (57, 372079), (129, 164407), (323, 65661), (509, 41667), (731, 29013), (817, 25959), (969, 21887), (1527, 13889), (2193, 9671), (2451, 8653)]