21037555

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1031}}^1$

素因数の和:1107

約数の個数: 32

約数和(自身を含む): 32099328

約数和(自身を除く): 11061773

約数列:

[1, 5, 7, 11, 35, 53, 55, 77, 265, 371, 385, 583, 1031, 1855, 2915, 4081, 5155, 7217, 11341, 20405, 36085, 54643, 56705, 79387, 273215, 382501, 396935, 601073, 1912505, 3005365, 4207511, 21037555]

約数ペア:

[(1, 21037555), (5, 4207511), (7, 3005365), (11, 1912505), (35, 601073), (53, 396935), (55, 382501), (77, 273215), (265, 79387), (371, 56705), (385, 54643), (583, 36085), (1031, 20405), (1855, 11341), (2915, 7217), (4081, 5155)]