664991721

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{857}}^1\times {\mathrm{991}}^1$

素因数の和:1886

約数の個数: 32

約数和(自身を含む): 1021363200

約数和(自身を除く): 356371479

約数列:

[1, 3, 9, 27, 29, 87, 261, 783, 857, 991, 2571, 2973, 7713, 8919, 23139, 24853, 26757, 28739, 74559, 86217, 223677, 258651, 671031, 775953, 849287, 2547861, 7643583, 22930749, 24629323, 73887969, 221663907, 664991721]

約数ペア:

[(1, 664991721), (3, 221663907), (9, 73887969), (27, 24629323), (29, 22930749), (87, 7643583), (261, 2547861), (783, 849287), (857, 775953), (991, 671031), (2571, 258651), (2973, 223677), (7713, 86217), (8919, 74559), (23139, 28739), (24853, 26757)]