21135951

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:424

約数の個数: 32

約数和(自身を含む): 32706240

約数和(自身を除く): 11570289

約数列:

[1, 3, 9, 27, 41, 61, 123, 183, 313, 369, 549, 939, 1107, 1647, 2501, 2817, 7503, 8451, 12833, 19093, 22509, 38499, 57279, 67527, 115497, 171837, 346491, 515511, 782813, 2348439, 7045317, 21135951]

約数ペア:

[(1, 21135951), (3, 7045317), (9, 2348439), (27, 782813), (41, 515511), (61, 346491), (123, 171837), (183, 115497), (313, 67527), (369, 57279), (549, 38499), (939, 22509), (1107, 19093), (1647, 12833), (2501, 8451), (2817, 7503)]