20840079

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{43}}^2$

素因数の和:136

約数の個数: 36

約数和(自身を含む): 32544456

約数和(自身を除く): 11704377

約数列:

[1, 3, 13, 17, 39, 43, 51, 129, 221, 289, 559, 663, 731, 867, 1677, 1849, 2193, 3757, 5547, 9503, 11271, 12427, 24037, 28509, 31433, 37281, 72111, 94299, 161551, 408629, 484653, 534361, 1225887, 1603083, 6946693, 20840079]

約数ペア:

[(1, 20840079), (3, 6946693), (13, 1603083), (17, 1225887), (39, 534361), (43, 484653), (51, 408629), (129, 161551), (221, 94299), (289, 72111), (559, 37281), (663, 31433), (731, 28509), (867, 24037), (1677, 12427), (1849, 11271), (2193, 9503), (3757, 5547)]