20407387

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:116

約数の個数: 64

約数和(自身を含む): 30643200

約数和(自身を除く): 10235813

約数列:

[1, 7, 11, 13, 19, 29, 37, 77, 91, 133, 143, 203, 209, 247, 259, 319, 377, 407, 481, 551, 703, 1001, 1073, 1463, 1729, 2233, 2639, 2717, 2849, 3367, 3857, 4147, 4921, 5291, 6061, 7163, 7511, 7733, 9139, 11803, 13949, 19019, 20387, 29029, 37037, 42427, 50141, 54131, 63973, 78793, 82621, 97643, 100529, 142709, 153439, 224257, 265031, 551551, 703703, 1074073, 1569799, 1855217, 2915341, 20407387]

約数ペア:

[(1, 20407387), (7, 2915341), (11, 1855217), (13, 1569799), (19, 1074073), (29, 703703), (37, 551551), (77, 265031), (91, 224257), (133, 153439), (143, 142709), (203, 100529), (209, 97643), (247, 82621), (259, 78793), (319, 63973), (377, 54131), (407, 50141), (481, 42427), (551, 37037), (703, 29029), (1001, 20387), (1073, 19019), (1463, 13949), (1729, 11803), (2233, 9139), (2639, 7733), (2717, 7511), (2849, 7163), (3367, 6061), (3857, 5291), (4147, 4921)]