19993640

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{5153}}^1$

素因数の和:5261

約数の個数: 32

約数和(自身を含む): 45458280

約数和(自身を除く): 25464640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 388, 485, 776, 970, 1940, 3880, 5153, 10306, 20612, 25765, 41224, 51530, 103060, 206120, 499841, 999682, 1999364, 2499205, 3998728, 4998410, 9996820, 19993640]

約数ペア:

[(1, 19993640), (2, 9996820), (4, 4998410), (5, 3998728), (8, 2499205), (10, 1999364), (20, 999682), (40, 499841), (97, 206120), (194, 103060), (388, 51530), (485, 41224), (776, 25765), (970, 20612), (1940, 10306), (3880, 5153)]