21185920

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4729}}^1$

素因数の和:4755

約数の個数: 64

約数和(自身を含む): 57895200

約数和(自身を除く): 36709280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4729, 9458, 18916, 23645, 33103, 37832, 47290, 66206, 75664, 94580, 132412, 151328, 165515, 189160, 264824, 302656, 331030, 378320, 529648, 605312, 662060, 756640, 1059296, 1324120, 1513280, 2118592, 2648240, 3026560, 4237184, 5296480, 10592960, 21185920]

約数ペア:

[(1, 21185920), (2, 10592960), (4, 5296480), (5, 4237184), (7, 3026560), (8, 2648240), (10, 2118592), (14, 1513280), (16, 1324120), (20, 1059296), (28, 756640), (32, 662060), (35, 605312), (40, 529648), (56, 378320), (64, 331030), (70, 302656), (80, 264824), (112, 189160), (128, 165515), (140, 151328), (160, 132412), (224, 94580), (280, 75664), (320, 66206), (448, 47290), (560, 37832), (640, 33103), (896, 23645), (1120, 18916), (2240, 9458), (4480, 4729)]