21238065

素因数分解:

$3^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2579}}^1$

素因数の和:2654

約数の個数: 32

約数和(自身を含む): 38390400

約数和(自身を除く): 17152335

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 135, 183, 305, 549, 915, 1647, 2579, 2745, 7737, 8235, 12895, 23211, 38685, 69633, 116055, 157319, 348165, 471957, 786595, 1415871, 2359785, 4247613, 7079355, 21238065]

約数ペア:

[(1, 21238065), (3, 7079355), (5, 4247613), (9, 2359785), (15, 1415871), (27, 786595), (45, 471957), (61, 348165), (135, 157319), (183, 116055), (305, 69633), (549, 38685), (915, 23211), (1647, 12895), (2579, 8235), (2745, 7737)]