21284613

素因数分解:

$3^6\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:165

約数の個数: 56

約数和(自身を含む): 37704128

約数和(自身を除く): 16419515

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 81, 97, 129, 189, 243, 291, 301, 387, 567, 679, 729, 873, 903, 1161, 1701, 2037, 2619, 2709, 3483, 4171, 5103, 6111, 7857, 8127, 10449, 12513, 18333, 23571, 24381, 29197, 31347, 37539, 54999, 70713, 73143, 87591, 112617, 164997, 219429, 262773, 337851, 494991, 788319, 1013553, 2364957, 3040659, 7094871, 21284613]

約数ペア:

[(1, 21284613), (3, 7094871), (7, 3040659), (9, 2364957), (21, 1013553), (27, 788319), (43, 494991), (63, 337851), (81, 262773), (97, 219429), (129, 164997), (189, 112617), (243, 87591), (291, 73143), (301, 70713), (387, 54999), (567, 37539), (679, 31347), (729, 29197), (873, 24381), (903, 23571), (1161, 18333), (1701, 12513), (2037, 10449), (2619, 8127), (2709, 7857), (3483, 6111), (4171, 5103)]