20619081

素因数分解:

$3^2\times 7^1\times {\mathrm{509}}^1\times {\mathrm{643}}^1$

素因数の和:1165

約数の個数: 24

約数和(自身を含む): 34157760

約数和(自身を除く): 13538679

約数列:

[1, 3, 7, 9, 21, 63, 509, 643, 1527, 1929, 3563, 4501, 4581, 5787, 10689, 13503, 32067, 40509, 327287, 981861, 2291009, 2945583, 6873027, 20619081]

約数ペア:

[(1, 20619081), (3, 6873027), (7, 2945583), (9, 2291009), (21, 981861), (63, 327287), (509, 40509), (643, 32067), (1527, 13503), (1929, 10689), (3563, 5787), (4501, 4581)]