20537720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1789}}^1$

素因数の和:1848

約数の個数: 64

約数和(自身を含む): 54129600

約数和(自身を除く): 33591880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 280, 287, 328, 410, 574, 820, 1148, 1435, 1640, 1789, 2296, 2870, 3578, 5740, 7156, 8945, 11480, 12523, 14312, 17890, 25046, 35780, 50092, 62615, 71560, 73349, 100184, 125230, 146698, 250460, 293396, 366745, 500920, 513443, 586792, 733490, 1026886, 1466980, 2053772, 2567215, 2933960, 4107544, 5134430, 10268860, 20537720]

約数ペア:

[(1, 20537720), (2, 10268860), (4, 5134430), (5, 4107544), (7, 2933960), (8, 2567215), (10, 2053772), (14, 1466980), (20, 1026886), (28, 733490), (35, 586792), (40, 513443), (41, 500920), (56, 366745), (70, 293396), (82, 250460), (140, 146698), (164, 125230), (205, 100184), (280, 73349), (287, 71560), (328, 62615), (410, 50092), (574, 35780), (820, 25046), (1148, 17890), (1435, 14312), (1640, 12523), (1789, 11480), (2296, 8945), (2870, 7156), (3578, 5740)]