19889961

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1777}}^1$

素因数の和:1841

約数の個数: 32

約数和(自身を含む): 33454848

約数和(自身を除く): 13564887

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 273, 287, 533, 861, 1599, 1777, 3731, 5331, 11193, 12439, 23101, 37317, 69303, 72857, 161707, 218571, 485121, 509999, 947141, 1529997, 2841423, 6629987, 19889961]

約数ペア:

[(1, 19889961), (3, 6629987), (7, 2841423), (13, 1529997), (21, 947141), (39, 509999), (41, 485121), (91, 218571), (123, 161707), (273, 72857), (287, 69303), (533, 37317), (861, 23101), (1599, 12439), (1777, 11193), (3731, 5331)]