19749987

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{313}}^1$

素因数の和:385

約数の個数: 40

約数和(自身を含む): 31914960

約数和(自身を除く): 12164973

約数列:

[1, 3, 9, 19, 27, 41, 57, 81, 123, 171, 313, 369, 513, 779, 939, 1107, 1539, 2337, 2817, 3321, 5947, 7011, 8451, 12833, 17841, 21033, 25353, 38499, 53523, 63099, 115497, 160569, 243827, 346491, 481707, 731481, 1039473, 2194443, 6583329, 19749987]

約数ペア:

[(1, 19749987), (3, 6583329), (9, 2194443), (19, 1039473), (27, 731481), (41, 481707), (57, 346491), (81, 243827), (123, 160569), (171, 115497), (313, 63099), (369, 53523), (513, 38499), (779, 25353), (939, 21033), (1107, 17841), (1539, 12833), (2337, 8451), (2817, 7011), (3321, 5947)]