21297345

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1777}}^1$

素因数の和:1849

約数の個数: 32

約数和(自身を含む): 36868608

約数和(自身を除く): 15571263

約数列:

[1, 3, 5, 15, 17, 47, 51, 85, 141, 235, 255, 705, 799, 1777, 2397, 3995, 5331, 8885, 11985, 26655, 30209, 83519, 90627, 151045, 250557, 417595, 453135, 1252785, 1419823, 4259469, 7099115, 21297345]

約数ペア:

[(1, 21297345), (3, 7099115), (5, 4259469), (15, 1419823), (17, 1252785), (47, 453135), (51, 417595), (85, 250557), (141, 151045), (235, 90627), (255, 83519), (705, 30209), (799, 26655), (1777, 11985), (2397, 8885), (3995, 5331)]