20884959

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{523}}^1$

素因数の和:581

約数の個数: 40

約数和(自身を含む): 34238160

約数和(自身を除く): 13353201

約数列:

[1, 3, 9, 17, 27, 29, 51, 81, 87, 153, 261, 459, 493, 523, 783, 1377, 1479, 1569, 2349, 4437, 4707, 8891, 13311, 14121, 15167, 26673, 39933, 42363, 45501, 80019, 136503, 240057, 257839, 409509, 720171, 773517, 1228527, 2320551, 6961653, 20884959]

約数ペア:

[(1, 20884959), (3, 6961653), (9, 2320551), (17, 1228527), (27, 773517), (29, 720171), (51, 409509), (81, 257839), (87, 240057), (153, 136503), (261, 80019), (459, 45501), (493, 42363), (523, 39933), (783, 26673), (1377, 15167), (1479, 14121), (1569, 13311), (2349, 8891), (4437, 4707)]