21520293

素因数分解:

$3^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{641}}^1$

素因数の和:713

約数の個数: 24

約数和(自身を含む): 31309056

約数和(自身を除く): 9788763

約数列:

[1, 3, 19, 31, 57, 93, 361, 589, 641, 1083, 1767, 1923, 11191, 12179, 19871, 33573, 36537, 59613, 231401, 377549, 694203, 1132647, 7173431, 21520293]

約数ペア:

[(1, 21520293), (3, 7173431), (19, 1132647), (31, 694203), (57, 377549), (93, 231401), (361, 59613), (589, 36537), (641, 33573), (1083, 19871), (1767, 12179), (1923, 11191)]