19494680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11887}}^1$

素因数の和:11939

約数の個数: 32

約数和(自身を含む): 44936640

約数和(自身を除く): 25441960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 11887, 23774, 47548, 59435, 95096, 118870, 237740, 475480, 487367, 974734, 1949468, 2436835, 3898936, 4873670, 9747340, 19494680]

約数ペア:

[(1, 19494680), (2, 9747340), (4, 4873670), (5, 3898936), (8, 2436835), (10, 1949468), (20, 974734), (40, 487367), (41, 475480), (82, 237740), (164, 118870), (205, 95096), (328, 59435), (410, 47548), (820, 23774), (1640, 11887)]