25370780

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1979}}^1$

素因数の和:2629

約数の個数: 24

約数和(自身を含む): 53388720

約数和(自身を除く): 28017940

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1979, 2564, 3205, 3958, 6410, 7916, 9895, 12820, 19790, 39580, 1268539, 2537078, 5074156, 6342695, 12685390, 25370780]

約数ペア:

[(1, 25370780), (2, 12685390), (4, 6342695), (5, 5074156), (10, 2537078), (20, 1268539), (641, 39580), (1282, 19790), (1979, 12820), (2564, 9895), (3205, 7916), (3958, 6410)]