20718477

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{881}}^1$

素因数の和:970

約数の個数: 32

約数和(自身を含む): 33586560

約数和(自身を除く): 12868083

約数列:

[1, 3, 9, 13, 27, 39, 67, 117, 201, 351, 603, 871, 881, 1809, 2613, 2643, 7839, 7929, 11453, 23517, 23787, 34359, 59027, 103077, 177081, 309231, 531243, 767351, 1593729, 2302053, 6906159, 20718477]

約数ペア:

[(1, 20718477), (3, 6906159), (9, 2302053), (13, 1593729), (27, 767351), (39, 531243), (67, 309231), (117, 177081), (201, 103077), (351, 59027), (603, 34359), (871, 23787), (881, 23517), (1809, 11453), (2613, 7929), (2643, 7839)]