81623560

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{193}}^1$

素因数の和:410

約数の個数: 64

約数和(自身を含む): 188218800

約数和(自身を除く): 106595240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 109, 193, 194, 218, 386, 388, 436, 485, 545, 772, 776, 872, 965, 970, 1090, 1544, 1930, 1940, 2180, 3860, 3880, 4360, 7720, 10573, 18721, 21037, 21146, 37442, 42074, 42292, 52865, 74884, 84148, 84584, 93605, 105185, 105730, 149768, 168296, 187210, 210370, 211460, 374420, 420740, 422920, 748840, 841480, 2040589, 4081178, 8162356, 10202945, 16324712, 20405890, 40811780, 81623560]

約数ペア:

[(1, 81623560), (2, 40811780), (4, 20405890), (5, 16324712), (8, 10202945), (10, 8162356), (20, 4081178), (40, 2040589), (97, 841480), (109, 748840), (193, 422920), (194, 420740), (218, 374420), (386, 211460), (388, 210370), (436, 187210), (485, 168296), (545, 149768), (772, 105730), (776, 105185), (872, 93605), (965, 84584), (970, 84148), (1090, 74884), (1544, 52865), (1930, 42292), (1940, 42074), (2180, 37442), (3860, 21146), (3880, 21037), (4360, 18721), (7720, 10573)]