21404621

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{277}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 26621280

約数和(自身を除く): 5216659

約数列:

[1, 7, 19, 49, 83, 133, 277, 581, 931, 1577, 1939, 4067, 5263, 11039, 13573, 22991, 36841, 77273, 160937, 257887, 436829, 1126559, 3057803, 21404621]

約数ペア:

[(1, 21404621), (7, 3057803), (19, 1126559), (49, 436829), (83, 257887), (133, 160937), (277, 77273), (581, 36841), (931, 22991), (1577, 13573), (1939, 11039), (4067, 5263)]