21352707

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{263}}^1$

素因数の和:400

約数の個数: 32

約数和(自身を含む): 33116160

約数和(自身を除く): 11763453

約数列:

[1, 3, 9, 27, 31, 93, 97, 263, 279, 291, 789, 837, 873, 2367, 2619, 3007, 7101, 8153, 9021, 24459, 25511, 27063, 73377, 76533, 81189, 220131, 229599, 688797, 790841, 2372523, 7117569, 21352707]

約数ペア:

[(1, 21352707), (3, 7117569), (9, 2372523), (27, 790841), (31, 688797), (93, 229599), (97, 220131), (263, 81189), (279, 76533), (291, 73377), (789, 27063), (837, 25511), (873, 24459), (2367, 9021), (2619, 8153), (3007, 7101)]