21156245

素因数分解:

$5^1\times {\mathrm{11}}^4\times {\mathrm{17}}^2$

素因数の和:83

約数の個数: 30

約数和(自身を含む): 29665410

約数和(自身を除く): 8509165

約数列:

[1, 5, 11, 17, 55, 85, 121, 187, 289, 605, 935, 1331, 1445, 2057, 3179, 6655, 10285, 14641, 15895, 22627, 34969, 73205, 113135, 174845, 248897, 384659, 1244485, 1923295, 4231249, 21156245]

約数ペア:

[(1, 21156245), (5, 4231249), (11, 1923295), (17, 1244485), (55, 384659), (85, 248897), (121, 174845), (187, 113135), (289, 73205), (605, 34969), (935, 22627), (1331, 15895), (1445, 14641), (2057, 10285), (3179, 6655)]