20409021

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{41}}^2\times {\mathrm{71}}^1$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 32254560

約数和(自身を除く): 11845539

約数列:

[1, 3, 9, 19, 41, 57, 71, 123, 171, 213, 369, 639, 779, 1349, 1681, 2337, 2911, 4047, 5043, 7011, 8733, 12141, 15129, 26199, 31939, 55309, 95817, 119351, 165927, 287451, 358053, 497781, 1074159, 2267669, 6803007, 20409021]

約数ペア:

[(1, 20409021), (3, 6803007), (9, 2267669), (19, 1074159), (41, 497781), (57, 358053), (71, 287451), (123, 165927), (171, 119351), (213, 95817), (369, 55309), (639, 31939), (779, 26199), (1349, 15129), (1681, 12141), (2337, 8733), (2911, 7011), (4047, 5043)]