805136680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{490937}}^1$

素因数の和:490989

約数の個数: 32

約数和(自身を含む): 1855745640

約数和(自身を除く): 1050608960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 490937, 981874, 1963748, 2454685, 3927496, 4909370, 9818740, 19637480, 20128417, 40256834, 80513668, 100642085, 161027336, 201284170, 402568340, 805136680]

約数ペア:

[(1, 805136680), (2, 402568340), (4, 201284170), (5, 161027336), (8, 100642085), (10, 80513668), (20, 40256834), (40, 20128417), (41, 19637480), (82, 9818740), (164, 4909370), (205, 3927496), (328, 2454685), (410, 1963748), (820, 981874), (1640, 490937)]