21217295

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^2$

素因数の和:251

約数の個数: 24

約数和(自身を含む): 28749168

約数和(自身を除く): 7531873

約数列:

[1, 5, 11, 41, 55, 97, 205, 451, 485, 1067, 2255, 3977, 5335, 9409, 19885, 43747, 47045, 103499, 218735, 385769, 517495, 1928845, 4243459, 21217295]

約数ペア:

[(1, 21217295), (5, 4243459), (11, 1928845), (41, 517495), (55, 385769), (97, 218735), (205, 103499), (451, 47045), (485, 43747), (1067, 19885), (2255, 9409), (3977, 5335)]