20995767

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{157}}^1$

素因数の和:309

約数の個数: 40

約数和(自身を含む): 34259456

約数和(自身を除く): 13263689

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 127, 157, 351, 381, 471, 1053, 1143, 1413, 1651, 2041, 3429, 4239, 4953, 6123, 10287, 12717, 14859, 18369, 19939, 44577, 55107, 59817, 133731, 165321, 179451, 259207, 538353, 777621, 1615059, 2332863, 6998589, 20995767]

約数ペア:

[(1, 20995767), (3, 6998589), (9, 2332863), (13, 1615059), (27, 777621), (39, 538353), (81, 259207), (117, 179451), (127, 165321), (157, 133731), (351, 59817), (381, 55107), (471, 44577), (1053, 19939), (1143, 18369), (1413, 14859), (1651, 12717), (2041, 10287), (3429, 6123), (4239, 4953)]