21304719

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{4019}}^1$

素因数の和:4075

約数の個数: 24

約数和(自身を含む): 33446400

約数和(自身を除く): 12141681

約数列:

[1, 3, 9, 19, 31, 57, 93, 171, 279, 589, 1767, 4019, 5301, 12057, 36171, 76361, 124589, 229083, 373767, 687249, 1121301, 2367191, 7101573, 21304719]

約数ペア:

[(1, 21304719), (3, 7101573), (9, 2367191), (19, 1121301), (31, 687249), (57, 373767), (93, 229083), (171, 124589), (279, 76361), (589, 36171), (1767, 12057), (4019, 5301)]