19986680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1741}}^1$

素因数の和:1800

約数の個数: 64

約数和(自身を含む): 52678080

約数和(自身を除く): 32691400

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, 1741, 2296, 2870, 3482, 5740, 6964, 8705, 11480, 12187, 13928, 17410, 24374, 34820, 48748, 60935, 69640, 71381, 97496, 121870, 142762, 243740, 285524, 356905, 487480, 499667, 571048, 713810, 999334, 1427620, 1998668, 2498335, 2855240, 3997336, 4996670, 9993340, 19986680]

約数ペア:

[(1, 19986680), (2, 9993340), (4, 4996670), (5, 3997336), (7, 2855240), (8, 2498335), (10, 1998668), (14, 1427620), (20, 999334), (28, 713810), (35, 571048), (40, 499667), (41, 487480), (56, 356905), (70, 285524), (82, 243740), (140, 142762), (164, 121870), (205, 97496), (280, 71381), (287, 69640), (328, 60935), (410, 48748), (574, 34820), (820, 24374), (1148, 17410), (1435, 13928), (1640, 12187), (1741, 11480), (2296, 8705), (2870, 6964), (3482, 5740)]