20787165

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{21997}}^1$

素因数の和:22018

約数の個数: 32

約数和(自身を含む): 42236160

約数和(自身を除く): 21448995

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 21997, 65991, 109985, 153979, 197973, 329955, 461937, 593919, 769895, 989865, 1385811, 2309685, 2969595, 4157433, 6929055, 20787165]

約数ペア:

[(1, 20787165), (3, 6929055), (5, 4157433), (7, 2969595), (9, 2309685), (15, 1385811), (21, 989865), (27, 769895), (35, 593919), (45, 461937), (63, 329955), (105, 197973), (135, 153979), (189, 109985), (315, 65991), (945, 21997)]