21781233

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{4909}}^1$

素因数の和:4961

約数の個数: 24

約数和(自身を含む): 34468200

約数和(自身を除く): 12686967

約数列:

[1, 3, 9, 17, 29, 51, 87, 153, 261, 493, 1479, 4437, 4909, 14727, 44181, 83453, 142361, 250359, 427083, 751077, 1281249, 2420137, 7260411, 21781233]

約数ペア:

[(1, 21781233), (3, 7260411), (9, 2420137), (17, 1281249), (29, 751077), (51, 427083), (87, 250359), (153, 142361), (261, 83453), (493, 44181), (1479, 14727), (4437, 4909)]