21140656

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77723}}^1$

素因数の和:77748

約数の個数: 20

約数和(自身を含む): 43369992

約数和(自身を除く): 22229336

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77723, 155446, 310892, 621784, 1243568, 1321291, 2642582, 5285164, 10570328, 21140656]

約数ペア:

[(1, 21140656), (2, 10570328), (4, 5285164), (8, 2642582), (16, 1321291), (17, 1243568), (34, 621784), (68, 310892), (136, 155446), (272, 77723)]