21105704

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{311}}^1\times {\mathrm{499}}^1$

素因数の和:833

約数の個数: 32

約数和(自身を含む): 42120000

約数和(自身を除く): 21014296

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 311, 499, 622, 998, 1244, 1996, 2488, 3992, 5287, 8483, 10574, 16966, 21148, 33932, 42296, 67864, 155189, 310378, 620756, 1241512, 2638213, 5276426, 10552852, 21105704]

約数ペア:

[(1, 21105704), (2, 10552852), (4, 5276426), (8, 2638213), (17, 1241512), (34, 620756), (68, 310378), (136, 155189), (311, 67864), (499, 42296), (622, 33932), (998, 21148), (1244, 16966), (1996, 10574), (2488, 8483), (3992, 5287)]