20997295

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{1321}}^1$

素因数の和:1371

約数の個数: 24

約数和(自身を含む): 29221488

約数和(自身を除く): 8224193

約数列:

[1, 5, 11, 17, 55, 85, 187, 289, 935, 1321, 1445, 3179, 6605, 14531, 15895, 22457, 72655, 112285, 247027, 381769, 1235135, 1908845, 4199459, 20997295]

約数ペア:

[(1, 20997295), (5, 4199459), (11, 1908845), (17, 1235135), (55, 381769), (85, 247027), (187, 112285), (289, 72655), (935, 22457), (1321, 15895), (1445, 14531), (3179, 6605)]