81687380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{240257}}^1$

素因数の和:240283

約数の個数: 24

約数和(自身を含む): 181635048

約数和(自身を除く): 99947668

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 240257, 480514, 961028, 1201285, 2402570, 4084369, 4805140, 8168738, 16337476, 20421845, 40843690, 81687380]

約数ペア:

[(1, 81687380), (2, 40843690), (4, 20421845), (5, 16337476), (10, 8168738), (17, 4805140), (20, 4084369), (34, 2402570), (68, 1201285), (85, 961028), (170, 480514), (340, 240257)]