20805309

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:167

約数の個数: 64

約数和(自身を含む): 37601280

約数和(自身を除く): 16795971

約数列:

[1, 3, 7, 9, 21, 27, 31, 53, 63, 67, 93, 159, 189, 201, 217, 279, 371, 469, 477, 603, 651, 837, 1113, 1407, 1431, 1643, 1809, 1953, 2077, 3339, 3551, 4221, 4929, 5859, 6231, 10017, 10653, 11501, 12663, 14539, 14787, 18693, 24857, 31959, 34503, 43617, 44361, 56079, 74571, 95877, 103509, 110081, 130851, 223713, 310527, 330243, 392553, 671139, 770567, 990729, 2311701, 2972187, 6935103, 20805309]

約数ペア:

[(1, 20805309), (3, 6935103), (7, 2972187), (9, 2311701), (21, 990729), (27, 770567), (31, 671139), (53, 392553), (63, 330243), (67, 310527), (93, 223713), (159, 130851), (189, 110081), (201, 103509), (217, 95877), (279, 74571), (371, 56079), (469, 44361), (477, 43617), (603, 34503), (651, 31959), (837, 24857), (1113, 18693), (1407, 14787), (1431, 14539), (1643, 12663), (1809, 11501), (1953, 10653), (2077, 10017), (3339, 6231), (3551, 5859), (4221, 4929)]