21061131

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:240

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 14791413

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 103, 107, 147, 273, 309, 321, 637, 721, 749, 1339, 1391, 1911, 2163, 2247, 4017, 4173, 5047, 5243, 9373, 9737, 11021, 15141, 15729, 28119, 29211, 33063, 65611, 68159, 77147, 143273, 196833, 204477, 231441, 429819, 540029, 1002911, 1620087, 3008733, 7020377, 21061131]

約数ペア:

[(1, 21061131), (3, 7020377), (7, 3008733), (13, 1620087), (21, 1002911), (39, 540029), (49, 429819), (91, 231441), (103, 204477), (107, 196833), (147, 143273), (273, 77147), (309, 68159), (321, 65611), (637, 33063), (721, 29211), (749, 28119), (1339, 15729), (1391, 15141), (1911, 11021), (2163, 9737), (2247, 9373), (4017, 5243), (4173, 5047)]