19780040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1723}}^1$

素因数の和:1782

約数の個数: 64

約数和(自身を含む): 52133760

約数和(自身を除く): 32353720

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, 1723, 2296, 2870, 3446, 5740, 6892, 8615, 11480, 12061, 13784, 17230, 24122, 34460, 48244, 60305, 68920, 70643, 96488, 120610, 141286, 241220, 282572, 353215, 482440, 494501, 565144, 706430, 989002, 1412860, 1978004, 2472505, 2825720, 3956008, 4945010, 9890020, 19780040]

約数ペア:

[(1, 19780040), (2, 9890020), (4, 4945010), (5, 3956008), (7, 2825720), (8, 2472505), (10, 1978004), (14, 1412860), (20, 989002), (28, 706430), (35, 565144), (40, 494501), (41, 482440), (56, 353215), (70, 282572), (82, 241220), (140, 141286), (164, 120610), (205, 96488), (280, 70643), (287, 68920), (328, 60305), (410, 48244), (574, 34460), (820, 24122), (1148, 17230), (1435, 13784), (1640, 12061), (1723, 11480), (2296, 8615), (2870, 6892), (3446, 5740)]