21340781

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{503}}^1$

素因数の和:569

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7689619

約数列:

[1, 7, 11, 19, 29, 77, 133, 203, 209, 319, 503, 551, 1463, 2233, 3521, 3857, 5533, 6061, 9557, 14587, 38731, 42427, 66899, 102109, 105127, 160457, 277153, 735889, 1123199, 1940071, 3048683, 21340781]

約数ペア:

[(1, 21340781), (7, 3048683), (11, 1940071), (19, 1123199), (29, 735889), (77, 277153), (133, 160457), (203, 105127), (209, 102109), (319, 66899), (503, 42427), (551, 38731), (1463, 14587), (2233, 9557), (3521, 6061), (3857, 5533)]