20791719

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 34944000

約数和(自身を除く): 14152281

約数列:

[1, 3, 9, 13, 19, 39, 47, 57, 117, 141, 171, 199, 247, 423, 597, 611, 741, 893, 1791, 1833, 2223, 2587, 2679, 3781, 5499, 7761, 8037, 9353, 11343, 11609, 23283, 28059, 34029, 34827, 49153, 84177, 104481, 121589, 147459, 177707, 364767, 442377, 533121, 1094301, 1599363, 2310191, 6930573, 20791719]

約数ペア:

[(1, 20791719), (3, 6930573), (9, 2310191), (13, 1599363), (19, 1094301), (39, 533121), (47, 442377), (57, 364767), (117, 177707), (141, 147459), (171, 121589), (199, 104481), (247, 84177), (423, 49153), (597, 34827), (611, 34029), (741, 28059), (893, 23283), (1791, 11609), (1833, 11343), (2223, 9353), (2587, 8037), (2679, 7761), (3781, 5499)]